1. Full Name Abiodun Isiaka SANNI
2. Date of birth 23rd May, 1959
3. State of Origin Osun State
4. Marital Status, number and ages of children Married, 1, 15 years
5. Academic Qualifications
(a) WASC Division 1 (June, 1974), WAEC, Yaba, Lagos, Nigeria
(b) B.Sc. (Botany) 2nd Class Upper Division (July, 1980), University of
Jos, Nigeria
(c) M. Sc. (Microbiology) (Sept., 1982), University of Ibadan, Nigeria
(d) PhD. (Microbiology) (Nov., 1985), University of Ibadan, Nigeria
Professional Qualifications and Diploma
(a) Certificate in Food Irradiation Technology (IAEA/FAO, 1990
Netherlands)
(b) Modular Certificates in Higher Education Pedagogy (Sept. 2003-
July 2004)
Learning in Higher Education
ix. Special: Writing Grant-Winning Proposals
6. Academic Distinctions
(a) Federal Government Postgraduate Scholarship 1982 - 1985
(b) University of Ibadan Postgraduate Scholar 1982 - 1985
(c) Guest Scholar, University of Lund, Sweden 1990 - 1991
(d) Research Scientist, IRD, Montpellier, France May 17 - Nov 17, 2000
(e) Georg Forster Research Fellow – Av Humboldt Nov 2004 –Oct 2005
(f) Av Humboldt African Research Initiative Fellow Oct-Dec. 2008
7. Teaching, Research, Administrative and Managerial Experience
Lecturer II, Lagos State University, Nigeria 1984-1987
Lecturer II, University of Ibadan, Nigeria 1988-1991
Lecturer I, University of Ibadan, Nigeria 1991-1994
Senior Lecturer, University of Ibadan, Nigeria 1994-1999
Visiting Scholar, University of Ghana, Accra, Ghana 1998-1999
Professor, University of Ibadan, Nigeria 1999-till date
External Examiner/Assessor of M.Sc, MPhil and Ph.D Theses
University of Ghana, Accra, Ghana, University of Lagos, Nigeria, Ahmadu Bello University, Nigeria, Tafawa Balewa University, Bauchi, Nigeria, Ekiti State University, Ado Ekiti, Nigeria, Adekunle Ajasin University, Akungba, Nigeria, University of Benin, Nigeria, Ambrose Alli University, Nigeria, University of Agriculture, Umudike, Nigeria, University of Agriculture, Abeokuta, Nigeria, Federal University of Technology, Owerri, Nigeria , University of Port-Harcourt, Nigeria, University of Ilorin, Nigeria, Bells University of Technology, Sango-Ota, Ogun State, Nigeria, North West University, South Africa.
8. Membership of Learned Societies, Committees and Boards
Member, Nigerian Society for Microbiology
Member, New York Academy of Science
Member, Biotechnology Society of Nigeria
Member, Science Association of Nigeria
Member, University Central Appointment & Promotion Committee 2000-2004,
2005-2011
Member, Faculty of Science A & P Committee
Member, University of Ibadan Linkage Board
Member, Award Board, Quality Management Development Institute, Nigeria.
Courses Taught
(a ) University of Ibadan
Department of Microbiology (formerly Dept. of Botany & Microbiology)
Undergraduate Level:
MIC 221- Introductory Microbiology
MIC 322 - Bacteriology
MIC 324 – Environmental Microbiology
MIC 424 – Microbial Physiology and Met
Postgraduate Level: MIC 721 - Advanced Bacteriology
MIC 724 - Microbiological Quality Control
MIC 725 - Microbial Ecology
MIC 726 - Industrial Microbiology
Department of Food Technology (Postgraduate)
TFT 703 – Fermentation Technology
Department of Pharmaceutical Microbiology (Postgraduate)
PHM 711 – Advanced Bacteriology
PHM 714 – Biotechnology in Pharmacy
(b) University of Ghana, Accra, Ghana
Undergraduate Level:
FDSC 301 - General Microbiology
FDSC 401 - Food Microbiology
FDSC 403 - Industrial Microbiology
Postgraduate Level: FDSC 602 - Advances in Microbiology
FDSC 610 – Food Biotechnology
(c) PhD. Theses Supervision
10. Microbiological and Nutritional Evaluation of Bambara Nut (Vigna subterranean) Tempeh (2008). Awarded to Festus I. Fadahunsi.
11. Characterisation and probiotic properties of lactic acid bacteria isolated from traditional fermented foods in Nigera (2012). Awarded to K. Banwo
12. Molecular characterisation and probiotic properties of Bifidobacteria isolated from human and chicken (2013). Awarded to J.E. Onyibe.
13. Molecular Characterisation and probiotic potentials of predominant Enterococcus gallinarum isolated from traditional fermented condiments and warakansi (2013). Awarded to C.I. Oladipo.
14. Characterisation and nutritional properties of yeasts isolated from traditional fermented foods products in Nigeria (2015). Awarded to O.R. Ogunremi
15. Polyphasic characterization and virulence profile of Listeria monocytogenes isolated from seafoods in Lagos, Nigeria. (2011). A. Amusan – on-going.
Research
(i) Completed
Summary of my completed research works can be categorized as follows:
(a) Microbial Taxonomy
Scientific information was provided on the associated microorganisms of the fermented products studied. Characterization of the microbes using both phenotypic and biochemical methods were carried out. Some of the fermented products and isolates were reported for the first time. Microbial taxonomy is an essential phase in the study of any fermentation process. This is because biotechnological typing of the isolates cannot be done without the knowledge of the identities of the associated microorganisms of any fermenting matrix.
(b) Biochemical Studies
Since fermented foods form a substantial part of the diet in sub-Saharan Africa, research efforts were geared towards providing information on the biochemical status of some of these food products. Some of the papers reported the biological ennoblement resulting from fermentation of the raw materials, while enzyme activities were also monitored. Of note is the effect of galactosidase treatment on soybeans. It was observed that the treatment not only significantly reduced the anti-nutritional constituents of the beans; the soymilk prepared from the treated beans had a ‘vanilla-like’ aroma and acceptable taste, as opposed to the usual off-flavour characteristic of the unfermented and untreated soymilk. Information provided in some of the studies can be advanced to yield economic benefits.
(c) Upgrade of Fermentation Processes
The preparation of fermented foods in sub-Saharan Africa is still a traditional family art based on old recipes transmitted from generation to generation. Research efforts were made to transform the above from the traditional art to science. Some of the works provided steps for optimization of the traditional processes with a view to obtaining consistent product’s quality. The use of starter-cultures (singly and mixed) featured prominently in some of the studies. The production of sour maize bread using lactic starters was regarded as innovative by a reviewer of the journal that published the article. Research studies on development of fermented weaning and adult foods with improved nutritional profile were also carried out. Such food products e.g. Ghanaian Banku, was used for an intervention study to arrest kwashiorkor in a study site in Ghana during my study leave.
(d) Soil and Environmental Microbiology
Few of the works provided information on the continued soil improvement in alley cropping by employing appropriate strains of Rhizobium. The usefulness of this study the farmers in sub-Saharan Africa cannot be over-emphasized. Biotyping of Pseudomonas species that can be further developed as a potential hydrocarbon biodegraders was carried out in one of the studies. However, more studies will need to be carried out to determine their bioremediation ability.
(e) International Collaborative Research
A project on ‘Ogi-Technology of West African fermented food from sorghum and maize’ was funded by SAREC (Swedish Agency for Research Cooperation with Developing Countries) for 3 years in University of Lund, Sweden. The project provided database for small-scale industrial production of ogi by optimizing the processing conditions. Some of the lactic acid bacteria strains identified produced ogi with final pH of less than 4.0 within 6 hours when used as starters. Another project on ‘Development of a cereal-yoghurt based on sorghum’ was equally sponsored by the same Agency for 3 years. Selected probiotic strains of Lactobacillus with ability to colonize human intestinal mucosa, achieve rapid Lactic acid fermentation of sorghum and also inactivate food pathogens, were used as candidate organisms.
In Ghana, the microbiological investigation of some of the works on USAID BEAN / COWPEA Collaborative Research Program of Department of Nutrition and Food Science, University of Ghana and Department of Food Science, University of Georgia, USA was carried out.
In the Laboratory of Biotechnology (Tropical Microbiology), Institute for Research and Development, Montpellier, France, efforts to characterize amylolytic lactic acid bacteria isolated from traditional fermented foods in Nigeria using physiological and amplified fragment length polymorphism fingerprint analysis, formed the main focus of our collaboration.
In the Institute für Hygiene und Toxikologie/BFEL, Germany, a 12- month Research Fellowship of Alexander von Humboldt was on “Characterization of Lactic Acid bacteria as starter cultures for the production of traditional fermented foods with health-promoting feature in sub-Saharan Africa” The specific objectives were: taxonomic characterization of LAB strains isolated from traditional fermented foods in Nigeria using molecular techniques such as restriction enzyme analysis (REA), pulsed-field gel electrophoresis, amplified fragment length polymorphism(AFLP), and or randomly amplified polymorphic DNA (RAPD) based on polymerase chain reaction (PCR); screening and characterization of the bacteriocins produced by the selected strains; determination of acidification potential, enzymatic activities, detection of health-promoting features such as barrier/restoration effects on diarrhoea, adherence and colonization resistance, stimulation of immune system, fermentation studies for the production of “health sogurt” etc.
(ii) In Progress
Characterisation of antimicrobial compounds, hydrolytic enzymes, and bacteriocin from
Lactic acid bacteria from traditional fermented foods; Identification and
biotechnological characterization of food yeasts; starter culture development for small-
scale fermentation in developing countries.
(f) Departmental and University Responsibilities
Departmental Postgraduate Coordinator, University of Ibadan 1988 - 1996
Departmental Time-Table coordinator, University of Ibadan 1988 - 1990
Departmental Seminar Coordinator, University of Ibadan 1991 - 1996
Coordinator, Departmental Research and Development Committee 1996 till date
Member, Faculty of Science Consultancy Committee, University
of Ibadan, Nigeria 1991-1993
Chairman, Departmental Fund Raising Committee, University
of Ibadan, Nigeria 1999
Member, University Central Appointment and Promotion
Committee, University of Ibadan, Nigeria 2000–2004, 2005-2011
Resource person, University of Ibadan PG School 2003 – 2007
Member, University Linkage Board 2004 – 2010
FUNDED RESEARCH PROJECTS
1. “Ogi – technology of West African fermented food from sorghum
and maize” (Funded by Swedish Agency for Research Cooperation
with Developing Countries –SAREC, Sweden) 1990 – 1993.
2. “Characterization of lactic acid bacteria from Nigerian traditional
Fermented Foods” (University of Ibadan Senate Research Grant)
1993 – 1994.
3. “Development of “cereal yoghurt” – Microbiological and
Technological Properties (Funded by Swedish Agency for Research
Cooperation with Developing Countries –SAREC, Sweden) 1994 - 1996.
4. “Screening for amylolytic lactic acid bacteria from Nigerian traditional
Fermented foods” (University of Ibadan Senate Research Grant)
1997 – 1998.
SELECTED PROFESSIONAL ACTIVITIES
Member, Accreditation Panel to Private Universities set up by National
Universities Commission (NUC), Nigeria – 2003.
Resource Person, Workshop on Entrepreneurial Studies in Nigerian Universities, organised by NUC, 2004.
Resource Person, Workshop on Review of Undergraduate Courses, organised by
NUC, 2004.
Certified Accreditor to Nigerian Universities 2001 till date.
9. Scholarly Publications
(a) Chapters in Books Already Published
1a. Sanni, A.I. 1992. Viruses. In Readings in Diversity of Plants. John West Publications, Lagos, Nigeria.
1b. Sanni, A.I. 1992. Bacteria. In Readings in Diversity of Plants. John West Publications, Lagos, Nigeria.
2. Ogundipe, G.A.T., Lucas, E.O. and Sanni, A.I. 2005. Systematic Collection of Data. In: Methodology of Basic and Applied Research (ISBN 978-37168- -1). (Eds. A.I. Olayinka, V.O. Taiwo, A. Raji-Oyelade and I.P. Farai) Published by: The Postgraduate School, University of Ibadan, Nigeria.
3. Sanni, A.I. 2006. Some Guidelines for Writing Journal Articles in the Basic Sciences. In:
Scholarly Writing and Publication (ISBN 976-38570-6-1) (Ed. A.I.Olayinka, Adetimirin and A. Ojebode). Published by: The Postgraduate School, University of Ibadan, Nigeria.
4. Sanni, A.I. and Oguntoyinbo, F.A. (2014) Diversity of Foods Involving Alkaline Fermentation. In: Handbook of Indigenous Foods Involving Alkaline Fermentation (Ed. M.J.R. Nout and P. Sarkar). Taylor and Francis Group, USA (
(b) Journal Articles
1. Sanni, A. I. (1988). Enzyme studies during the production of agadagidi: Amylase activities. Die Nahrung 32 (2), 159-161.
2. Sanni, A. I. (1988). Enzyme studies during the production of agadagidi: Invertase activities. Die Nahrung 32 (2), 163-168.
3. Sanni, A.I. and Oso, B.A. (1988). Nutritional studies on agadagidi. Die Nahrung 32 (2), 169-172.
4. Sanni, A. I. and Oso, B.A. (1989). The production of agadagidi, a Nigerian fermented alcoholic beverage. Die Nahrung 32 (2), 319-326.
5. Sanni, A.I. (1989). Some environmental and nutritional factors affecting growth of associated microorganisms of agadagidi. J. Basic Microbiology 29 (9), 617-622.
6. Sanni, A.I. (1989). Chemical studies on sekete beer. Food Chemistry. 33,187-191.
7. Sanni, A.I. and Ogbonna, D.N. (1991). The production of owoh, a Nigerian fermented soup condiment from cotton seeds. Food Microbiology 8, 223 - 229.
8. Sanni A.I. and Ogbonna, D.N. (1992). Biochemical studies on owoh, a Nigerian fermented soup condiment from cotton seeds. Food Microbiology 9, 177-183.
9. Sanni, A.I. (1993). The need for process optimization of African fermented foods and beverages. Inter. Jour. of Food Microbiology 18, 85 - 95.
10. Sanni, A.I. (1993). Biochemical changes during the production of okpehe, a Nigerian fermented food condiment. Chem. Microbiol.Technol Lebensm 15 (3/4), 97-100.
11. Sanni, A.I., Lie, E. and Lindberg, A.M. (1993). Fatty acid composition of Prosopis africana and its fermented product, okpehe. Chem. Microbiol. Technol. Lebensm 15 (3/4), 89 - 90.
12. Sanni, A.I., Lonner, C. (1993). Identification of yeasts isolated from Nigerian traditional alcoholic beverages. Food Microbiology 10, 517 - 523.
13. Sanni, A.I., Lonner, C., Marklinder, I., Johansson, M-L and Molin, G. (1994). Starter cultures for the production of ogi, a fermented infant food from maize and sorghum. Chem. Microbiol. Technol. Lebensm 16 (1/2), 29 -33.
14. Johansson, M.L., Sanni, A.I., Lonner, C. and Molin, G. (1995). Phenotypically -based taxonomy using API 50 CH of Lactobacilli from Nigerian ogi, and the occurrence of starch-fermenting strains. Inter Jour. of Food Microbiology. 25, 159-168.
15. Sanni, A.I., Ahrne, S and Onilude, A.A. (1995). Alpha-galactosidase production by six strains of Lactobacillus plantarum isolated from diverse sources. Jour of Basic Microbiol. 35 (6), 427 - 432.
16. Sanni, A.I., Fapohunda, E.M. and Onilude, A.A. (1995). Characteristic properties of lactic acid bacteria isolated from rumen of maradi goats. Chem. Microbiol. Technol. Lebensm. 17 (3/4), 99 - 104.
17. Sanni, A.I., Onilude, A.A. and Mbandi, E. (1996). Production of vinegar from pineapple using starter cultures. Nig. Food Jour. 14, 37 - 41.
18. Sanni, A.I., Onilude, A.A; and Ogundoye, D.R. (1997). Effect of bacterial galactosidase treatment on the nutritional status of soybean and its milk derivative. Die Nahrung- Food. 41 (1), 18 - 21.
19. Sanni, A.I. and Onilude, A.A. (1997). Effect of temperature on the ethanol tolerance of yeasts isolated from traditional alcoholic beverages. Jour. of Sci. Research 3 (1) 75 - 77.
20. Sanni, A.I. and Ekunsanmi, J.T. (1997). Physiological studies on osmophilic yeasts isolated from some high sugar substrates. Jour. of Sci. Research 3 (1) 61 -65.
21. Sanni, A.I., and Onilude, A.A. (1997). Polygalaturonase production by L. plantarum OW 14 isolated from ogi. Jour. of Sci. Research 3(1) 78 -81.
22. Sanni, A.I. and Onilude, A.A. (1997). Characteristics of Bacillus spp. isolated from okpehe, a fermented soup condiment from Prosopis africana. Nig. Jour. Sci. 31 (1), 49 - 52.
23. Sanni, A.I., Onilude, A.A. and Ibidapo, O.T. (1998). Biochemical composition of infant weaning food fabricated from fermented blends of cereal and soybean. Food Chemistry 65 (1), 35 - 39.
24. Sanni, A.I., Onilude, A.A. and Oguntoyinbo, F.A. (1998). Optimization of process conditions for owoh, a fermented cotton seed condiment. Adv. Food Sci. (CMTL) 20 (5/6), 163 - 167.
25. Sanni, A.I., Onilude, A.A. and Fatungase, M.O. (1998). Production of sour maize bread using starter cultures. World J. Microbiol Biotechnol. 14 (1), 101 - 106.
26. Sanni, A.I., Onilude, A.A., Mulongoy, K and Ojeifo, A.A. (1998) Survival and persistence of Rhizobium strains in tropical alley cropping. Nig. Jour. Sci. 32 (1), 59 - 70.
27. Ekwenye, U. N. and Sanni, A. I. (1998) Characterization of yeasts isolated from fruits, honey and jam. Global Jour. of Pure & Appl. Sci. 4, 375-380.
28. Sanni, A.I., Onilude, A.A. and Ibidapo, O.T. (1999). Physico-chemical characterization of formulated infant and adult food. Lebens. Unters Forsch-A 203 (13), 221 - 224.
29. Sanni, A.I., Onilude, A.A. and Adeleke, E.O. (1999). Nutritional composition of lactic acid fermented cowpea milk. Lebens. Unters Forsch-A 203 (3) 225 - 229.
30. Sanni, A.I., Onilude, A.A., Ogunbanwo, S.T and Smith, S.I. (1999). Antagonistic activity of bacteriocin produced by Lactobacillus spp. from ogi, an indigenous fermented food. J. Basic Microbiol. 39 (3), 189 - 195.
31. Sanni, A.I., Onilude, A.A. and Momoh, M.O. (1999). Selection of starters and a starter-mediated novel procedure for production of wara, a West African soft cheese. Inter. Jour. Food Sci. and Technol. 34, 325 - 333.
32. Sanni, A.I., Onilude, A.A., Fadahunsi, I.F. and Afolabi, R.O. (1999). Microbial deterioration of traditional alcoholic beverages in Nigeria. Food Research Intern. 32, 163 - 167.
33. Sefa-Dedeh, S., Sanni, A.I., Tetteh, G. and Sakyi-Dawson, E. (1999). Yeasts in the traditional brewing of pito in Ghana. World Jour. Microbiol. Biotechnol. 15 (5), 593 - 597.
34. Sanni, A.I., Onilude, A.A., Ogodo, O.O. and Fadahunsi, I.F. (1999). Production of intracellular proteinase by Lactobacillus spp. isolated from indigenous fermented foods. Nig. Jour. Sci. 33, 333 - 341.
35. Onilude, A.A., Sanni, A.I. and Ogunbanwo, S.T (1999). Drug resistance plasmids in Lactobacillus spp. isolated from ogi, a Nigerian fermented cereal food. Nig. Jour. Sci. 33, 299 - 309.
36. Onilude, A.A., Sanni, A.I., and Ighalo, M.I. (1999). Effect of process improvement on the physico-chemical properties of infant weaning food from composite blends of cereal and soybeans. Plant Foods for Human Nutr. 54, 239 - 250.
37. Sanni, A.I., Sefa-Dedeh, S., Sakyi-Dawson, E., and Asiedu, M. (1999). Effect of processing conditions on the viscosity, in vitro protein and starch digestibility of ogi-baba, a Nigerian fermented sorghum gruel .Proceedings of the International Workshop on Cowpea Processing and Utilization. January, 1999, University of Ghana, Accra, Ghana. pp. 23 – 28.
38. Sanni, A.I., Sefa-Dedeh, S., Sakyi-Dawson, E., and Asiedu, M. (1999). Microbiological evaluation of cowpea - fortified Ghanaian fermented Maize dough. Proceedings of the International Workshop on Cowpea Processing and Utilization. January, 1999, University of Ghana, Accra, Ghana. pp. 80 - 86.
39. Sanni, A.I., Ayernor, G.S and Sakyi-Dawson, E. and Sefa-Dedeh, S. (2000). Aerobic spore-forming bacteria and chemical composition of some Nigerian fermented soup condiment. Plant Foods for Human Nutr. 55, 111-118.
40. Sanni, A.I., Ohenhen, R.E. and Onilude, A.A. (2000) Production of extracellular proteinase by Lactobacillus species isolated from traditional alcoholic beverage. Nigerian Jour. of Microbiology 14 (1), 55-61.
41. Sanni, A.I., Asiedu, M. and Ayernor, G.S (2001). Influence of processing conditions on the nutritive value of ogi-baba, a Nigerian fermented sorghum gruel. Plant Foods for Human Nutr. 56, 217-223.
42. Falegan, C.R., Arowolo, J.A., Fagbohun, E.D. and Sanni, A.I. (2001). Antimicrobial activities of Lactobacillus plantarum isolated from palm wine and burukutu. African Jour. of Sci. 1, 30-37.
43. Sanni, A.I., Morlon-Guyot, J. and Guyot J.P (2002). New efficient amylase- producing strains of Lactobacillus plantarum and L. fermentum isolated from Nigerian traditional fermented foods. Inter. Jour. Food Microbiology 72, 53-62.
44. Onilude, A.A., Sanni, A.I., Olaoye, O.A. and Ogunbanwo, S. T. (2002). Influence of lactic cultures on the quality attributes of tsire, a West African stick meat. World J. Microbiol. Biotechnol. 18, 615-619.
45. Oguntoyinbo, F. A., Onilude, A.A. and Sanni, A.I. (2001). Microflora and proximate composition of okpehe, a fermented condiment from Prosopis africana seeds. Adv. Food Sci. 23, 165-170.
46. Sanni, A.I., Onilude, A.A., Ogunbanwo, S.T., Fadahunsi, I. F. and Afolabi, R.O. (2002). Production of exopolysaccharide by lactic acid bacteria isolated from traditional fermented foods in Nigeria. Euro. Food Res. Technol 214, 405-407.
47. Asiedu, M and Sanni, A.I. (2002). Chemical composition and Microbiological changes during spontaneous and starter culture fermentation of Enam Ne Setaakye, a West African fermented fish-carbohydrate product. Euro. Food Res. Technol. 215, 8-12.
48. Sanni, A.I., Onilude, A.A., Fadahunsi, I.F., Ogunbanwo, S.T and Afolabi, R.O. (2002). Selection of starter cultures for the production of ugba, a fermented soup condiment. Euro. Food Res. Technol. 215 (2) 176-180.
49. Sanni, A.I., Sefa-Dedeh, S., Sakyi-Dawson, E and Asiedu, M. (2002). Microbiological evaluation of Ghanaian maize dough co-fermented with cowpea. Int. Jour. Food Sci. and Nutrition 53 (5), 367-373.
50. Sanni, A.I., Ayernor, G.S. and Asiedu, M. (2002). Microflora and chemical composition of momoni, a Ghanaian fermented fish condiment. Jour. Food Comp. and Analysis 15 (5), 577-583.
51. Sanni, A.I., Onilude, A.A., Ogunbanwo, S.T. and Fadahunsi, I. F.(2003). Growth and acid production of lactic acid bacteria in cowpea milk. Research Communications in Microbiology 1(1), 40-45.
52. Babalola, O.O., Osir, E.O. and Sanni, A.I. (2002). Characterization of potential ethylene-producing rhizosphere bacteria of Striga-infested maize and sorghum. Afr. J. Biotechnol. 1(2) 67-69.
53 Ogunbanwo, S.T., Sanni, A.I. and Onilude A.A. (2003) Influence of cultural conditions on the production of bacteriocin by Lactobacillus brevis OG1. Afr. J. Biotechnol. 2 (7), 179-184.
55. Ogunbanwo, S.T., Sanni, A.I. and Onilude A.A. (2003) Characterization of bacteriocin produced by Lactobacillus plantarum F1 and L. brevis OG1. Afr. J. Biotechnol. 2 (8), 219-227.
56. Babalola, O.O., Osir, E.O., Sanni, A.I., Odhiambo, G.D and Bulimo, W.D. (2003). Amplification of 1-amino-cyclopropane-1-carboxylic (ACC) deaminase from plant growth promoting rhizobacteria in Striga-infested soil. Afr. J. Biotechnol 2 (6), 157-160.
57. Sanni, A.I., Onilude, A.A.., Fadahunsi, I. F. and Ogunbanwo, S.T (2002). Microbiology and amino acid composition of sekete beer. Research Communications in Food Science 1 (1) 29-35.
58. Sanni, A.I., Onilude, A.A., Ogunbanwo, S.T and Fadahunsi, I. F. (2002). Growth and acid production of lactic acid bacteria in cowpea milk. Research Communications in Food Science 1 (1) 40 - 45.
59. Ogunbanwo, S.T., Sanni, A.I. and Onilude A.A. (2004) Influence of bacteriocin in the control of Escherichia coli infection of broiler chickens in Nigeria. World J. Microbiol. Biotechnol . 20, 51-56.
60. Ogunbanwo, S.T., Sanni, A.I. and Onilude A.A. (2004) Effect of bacteriocinogenic Lactobacillus spp. on the shelf life of fufu, a traditional fermented cassava product. World J. Microbiol. Biotechnol. 20, 57-63.
61. Babalola, O. O., Sanni, A.I. and Odhiambo, G.D. (2004). Isolation of rhizobacteria associated with maize and assessment of their potential for use in Striga hermonthica (Del.). Benth. suicidal germination J. Tropical Microbiology 3 (1), 64 –70.
62. Onilude, A. A., Sanni, A. I. and Ighalo, M. I. (2004). Process upgrade and the microbiological, nutritional and consumer acceptability of infant weaning food from fermented composite blends of cereals and soybean. J. Food , Agric & Environ 2, 64-68.
63. Asagbra, A. E., Sanni, A. I. and Oyewole, O. B. (2005) Solid-state fermentation production of tetracycline by Streptomyces strains using some agricultural wastes as substrate. World J. Microbiol. Biotechnol . 21, 107-114.
64. Edema, M.O., Sanni, L. O. and Sanni, A. I. (2005) Evaluation of maize-soybean flour blends for sour maize bread production in Nigeria. Afr. J. Biotechnol. 4 (9), 911-918.
65. Edema, M.O. and Sanni, A. I. (2006) Micro-population of fermenting maize meal for sour maize bread production in Nigeria. Nig. J. Microbiol 20 (2) 937 – 946.
66. Asagbra, A. E., Sanni, A. I. and Oyewole, O. B. (2006) Improvement of tetracycline production by Streptomyces sp. OXC1 in medium containing organic nitrogen and lipids. Inter. J. of Biosciences 3 (4) 7-14.
67. Oguntoyinbo, F. A. and Sanni, A. I. (2007a).Determination of toxigenic potentials of Bacillus strains isolated from okpehe, a Nigerian fermented condiment. World J. Microbiol. Biotechnol. 23, 65 – 70.
68. Oguntoyinbo, F. A., Sanni, A. I., Franz, C. M. A. P. and Holzapfel, W. H. (2007b). Phenotypic diversity and technological properties of Bacillus subtilis species isolated from okpehe, a traditional fermented condiment. World J. Microbiol. Biotechnol. 23, 401 – 410.
69. Oguntoyinbo, F. A., Sanni, A. I., Franz, C. M. A. P. And Holzapfel, W. H. (2007c). In-vitro fermentation studies for selection and evaluation of Bacillus strains as starter cultures for the production of okpehe, a traditional African fermented condiment Inter. J. Food Microbiol. 113, 208 – 218.
70. Asagbra, A. E., Sanni, A. I. and Oyewole, O. B. (2006) Characterization and fermentation studies on a Streptomyces strain of Nigerian soil origin. Jour. of Industrial Research & Technol. 1, 1-9.
71. Edema, M.O. and Sanni, A.I. (2008). Functional properties of selected starter cultures for sour maize bread. Food Microbiol. 25, 616-625.
72. Oguntoyinbo, F.A., Huch, M., Cho., G, Schillinger, U., Holzapfel, W.H., Sanni, A.I. and Franz, C.M.A.P. (2010). Diversity of Bacillus species isolated from Okpehe, a traditional fermented soup condiment from Nigeria. J. Food Protection 73 (5), 870-878.
73. Dike, K.S and Sanni, A.I. (2010). Influence of starter culture of lactic acid bacteria on the shelf life of agidi, and indigenous fermented cereal product. Afr. J. Biotechnol 9 (46), 7922 – 7927.
74. Fadahunsi I.F. and Sanni, A.I. (2010) Chemical and biochemical changes in Bambara Nut (Voandzela subterranean (L) Thours) during fermentation to “tempeh”. EJEAFChe, 9 (2) 275 – 283.
75. Ogunshe A.A.O., Sanni, A.I. and Olukoya, D.K. (2011). Potential probiotics from faecal specimens of breastfed Nigerian infants as a therapy for bacteria gastroenteritis. Sri Lanka J. Child Health, 40 (3) 116 – 124.
76. Ogunremi, O.R. and Sanni, A.I. (2011). Occurrence of amylolytic and or/ Bacteriocin-producing lactic acid bacteria in ogi and fufu. Annals Food Sci. Technol 12 (1) 71-77.
77. Lawal, A.K., Oso, B.A., Sanni, A.I., Grillo, J.A. and Elemo, G.N. (2011). Production of L-glutamic acid from Bacillus isolates cultivated on agro-industrial waste containing medium. Global Research J. of Microbiol. 1 (3) 043 -055.
78. Banwo, K., Sanni, A., Tan, H. and Tian, Y. (2012). Phenotypic and genotypic characterization of lactic acid bacteria isolated from some Nigerian traditional fermented foods. Food Biotechnology, 26 (2), 124-142.
79. Banwo, K., Sanni, A. and Tan, H. (2012). Technological properties and probiotic potential of Enterococcus faecium strains isolated from cow milk. J. Applied Microbiol. 114, 229-241.
80. Banwo, K., Sanni A. and Tan, H. (2013). Functional properties of Pediococcus species isolated from traditional fermented cereal gruel and milk in Nigeria. Food Biotechnology 27 (1), 39-53.
81. Oladipo, I.C., Sanni, A. and Suarnakar, S. (2013). Phenotypic and genomic characterization of Enterococcus species from some Nigerian fermented foods. Food Biotechnology 27 (1), 14-38.
82. Sanni, A.I., Franz, C. M. A. P., Schilinger, U., Huch, M., Guigas, C and Holzapfel, W. H. (2013) Characterization and technological properties of lactic acid bacteria in the production of “sorghurt”, a cereal-based product. Food Biotechnology 27 (2) 178-198.
83. Edema, M.O. and Sanni, A.I. 2009. Functional properties of sour maize bread started on mixed culture of three indigenous microflora. Proceedings of the 21st Annual Conference of the Biotechnology Society of Nigeria, 16-19 July, 2008. pp. 66-70.
84. Edema, M.O., Sanni, L.O. and Sanni, A.I. 2005. Evaluation of maize-soybean flour blends for sour maize bread production in Nigeria. Afri. J. Biotechnol. 4, 911- 918.
85. Babalola, O.O., Sanni, A.I., Odhiambo, G.D. and Baldwyn, T. 2007. Plant growth-promoting rhizobacteria do not pose any deleterious effect on cowpea and detectable amounts of ethylene produced. World J. Microbiol. Biotechnol. 23, 747-752.
86. Onyibe, J.E., Oluwole, O.B., Ogunbanwo, S.T. and Sanni, A.I. 2013a. Antibiotic susceptibility profile and survival of Bifidobacterium adolescentis and Bifidobacterium catenulatum of human and avian origin in stored yoghurt. Nig. Food J. 31, 73-83.
87. Onyibe, J.E., Asagbra, A.E., Bankole, A.O., Elemo, G.H. and Sanni, A.I. 2013b. Hydrophobicity and autoaggregation of Bifidobacterium species of human and avian origin. Analy. Sci. J. 1, 5-16.
88. Elujoba, R., Banwo, K., Ogunremi, O.R. and Sanni, A.I. 2013. Influence of nixtamlisation, cowpea fortification and fermentation on the microflora and quality attributes of sorghum-ogi (a cereal-based weaning food). Nigerian Journal of Science 47: 73-83.
89. Adegboye B.D., Banwo, K., Ogunremi, O. R. and Sanni, A.I 2014. Probiotic Potentials of Yeasts isolated from Nono (African fermented milk) and Wara (African soft cheese) Advances in Food Sciences 36 (3) 115-124.
90. Onipede, G. O., Banwo, K., Ogunremi, O. R. and Sanni, A.I. 2014. Influence of Lactic Acid Bacteria on the Phytic Acid Content of Sorghum-Ogi (An indigenous cereal gruel) Annals of Food Science and Technology 15 (1) 122-134 .
91. Ikhane, D., Banwo, K., Ogunremi, T. and Sanni, A.I. 2015. Phytochemical and Antimicrobial activities of Methanolic extract of Paullinia pinnata Leaves on some selected bacterial pathogens. Journal of Herbs, Spices and Medicinal Plants, 21: 59-74 DOI:10.1080/10496475.2014.906015.
92. Alakeji, T. P., Banwo, K., Ogunremi, O. R. and Sanni, A.I. 2015. Probiotic and hypocholesterolemic potentials of yeasts isolated from some Nigerian traditional fermented foods. Journal of Microbiology, Biotechnology and Food Sciences, 4(5): 437-441
93. Ogunsakin, A. O., Banwo, K., Ogunremi, O. R. and Sanni, A.I. 2015. Microbiological and Physicochemical Properties of Sourdough Bread from Sorghum flour. International Food Research Journal, 22(6): 2610-2618
94. Ogunremi, O. R., Sanni, A. I. and Agrawal, R. 2015. Hypolipidaemic and antioxidant effects of functional cereal-mix produced with probiotic yeasts in rats fed high cholesterol diet. Journal of Functional Foods, 17: 742-748.
95. Ogunremi, O. R., Sanni, A. I. and Agrawal, R. 2015. Probiotic potentials of yeasts isolated from some cereal-based Nigerian traditional fermented food products. Journal of Applied Microbiology, 119: 797-808.
96. Ogunremi, O. R., Agrawal, R. and Sanni, A. I. 2015. Development of cereal-based functional food using cereal-mix substrate fermented with probiotic strain- Pichia kudriavzevii OG 32. Food Science and Nutrition 3 (6) 488-494.
97. Oladipo, I. C., Sanni, A.I., Chakraborty, W., Chakravorty, S., Jana, S., Rudra, D.S., Gacchui, R. and Swarnakar, S. 2015. Bioprotective potential of Enterococcus gallinarum strains isolated from some Nigerian fermented foods, and of their bacteriocins. Polish Journal of Microbiology 63 (4): 415-422.
98. Oladipo, I. C., Sanni, A.I., Chakraborty, W., Chakravorty, S., Jana, S., Rudra, D.S., Gacchui, R. and Swarnakar, S. 2015. Technological properties of strains of Enterococcus gallinarum isolated from Nigerian traditional fermented foods. Malaysian Journal of Microbiology 11 (1) 1-13.
Ten Publications (including Abstracts) that best reflect my Contributions to Scholarship and Research
Nigerian traditional alcoholic beverages. Food Microbiol. 10, 517- 523.
Forty-nine yeast isolates were picked from 20 samples of five different kinds of Nigerian traditional alcoholic beverages. They were identified by the conventional methods in conjunction with the use of simplified scheme of Deak and Beuchat. Saccharomyces cerevisiae (11 isolates) was isolated from all the beverages while Schizosaccharomyces pombe (1) and S. japonicus (1) wee only isolated from palmwine. Other yeasts included Candida castelii (1), C. fructus (2), C. intermedia (1), C. krusei (3), C. tropicalis (4), Geotrichum candidum (4), Hansenula anomala (2), Kloeckera apiculata (4), Pichia membraefaciens (3), P. ohmeri (1), Saccharomyces chevalieri (1), S. uvarum (1), Kluyveromyces africanus (2), Torulaspora delbruekii (3) and Rhodotorula graminis (3). The distribution of the species in the beverages is shown.
fermented foods and beverages. Inter. Jour. of Food Microbiology 18, 85 – 95.
Many papers have been published on various aspects of African fermented foods and beverages. The emphasis has been on the microorganisms used, and the nutritional status of the products after fermentation. The preparation of these products is still a traditional family art and the fermentation process is by uncontrolled inoculation. This has led to variations in the quality and stability of products. Research efforts in this field are still based on old recipes transmitted from generation to generation due to the fact that the consumers are not easily influenced by innovations, and the apparent lack of biotechnological background.
This paper gives a brief account of the fermentation process of some of the fermented products to show the varied pattern of the microbiology. The unpredictability of the complex microflora implicated in the fermentation, and the lack of adequate knowledge of the associated microbes are discussed.
The paper suggests a member of steps to be taken to optimize the fermentation process as a means of maintaining the peculiar characteristics of each product and establishment of small-scale industrial production.
3. Sanni, A.I., Lonner, C., Marklinder, I., Johansson, M.L and Molin G. (1994) Starter cultures for the production of ogi, a fermented infant food from maize and sorghum. Chem. Mikrobiol. Technol. Lebensm. 16 ((1/2), 29 -33.
Starter cultures were used to ferment maize and sorghum for ogi production either singly or as mixed cultures. L. plantarum, L. jensenii,L. agilis, unidentified Lactobacillus sp., and the yeast Debaryomyces hansenii were used for producing ogi with acceptable organoleptic properties. L. plantarum gives the best result, exhibited the highest acid producing ability, and decreased pH of the fermenting starch suspension from 5.9 to 3.4 within 12 hours with a corresponding lactic acid production of 0.76 g/100 g after 24 hours of fermentation. Production of ogi with a pH below 4.0 within 12 hours employing a single starter cultur is an improvement on the traditional processing that takes 2-3 days to achieve the same pH range. The gelling property and starch stability of the ogi samples are also reported.
4. Johansson, M.L., Sanni, A.I., Lonner, C. and Molin, G. (1995).
Phenotypically-based taxonomy using API 50 CH of Lactobacilli from
Nigerian ogi and the occurrence of starch - fermenting strains.
Inter. Jour. of Food Microbiology 25, 159 - 168.
One hundred and twenty isolates of lactic acid bacteria isolated from ogi and three traditional cereal-based alcoholic beverages from Nigeria, together with 18 reference strains from Swedish sour doughs, and 50 type-and reference strains of mainly Lactobacilus, were phenotypically classified on their fermentation ability of 49 carbohydrates, including soluble starch. Data were examined by Jaccard Coefficient (Sj), Simple Matching Coefficient (Ssm) and unweighted par group algorithm with arithmetic averages (UPGMA). Seven major clusters were defined at the 82% Sj-similarity level (corresponds to the Ssm-level of 91%). Three were identified as Lactobacillus plantarum or L. plantarum,-like (together 41% of the ogi isolates). The others were obligately heterofermentative; Cluster 7 was identified as L. confusus (11% of the ogi isolates). Three minor clusters were identified as L. murinus, L. agilis or L. gallinarium, and Leuconostoc mesenteroides, respectively. The phenotype of the L. plantarum isolates varied within wide limits. Seventeen isolates possessed starch-fermenting capacity. Nine of these were identified as L. plantarum or L. plantarum-like (isolated from ogi); one was identified as Leuconostoc mesenteroides subsp. mesenteroides, and the rest were unidentified non-clustering strains.
5. Sanni, A.I., Onilude, A.A. and Ogundoye, D.R. (1997). Effect of bacterial galactosidase treatment on the nutritional status of soybean and its milk derivative. Die Nahrung- Food 41 (1), 18 - 21.
Four field strains of Lactobacillus plantarum (LS 4, 19, 21, 133) obtained from from fufu (a semi-solid product obtained by boiling fermented cassava-Manihot esculenta Crantz) and a type strain DSM 2017 were grown on different carbon sources to induce galactosidase production. LS 21 produced the highest concentration of α- and β-galactosidase with 0.28µmol/L and 0.28µmol/L respectively on lactose and galactose. Milk obtained from sybean seeds treated with the enzyme mixture for 24 h showed a 99, 98 and 96% reduction respectively in the raffinose, stachyose and sucrose content when comared with the dry soybean seed. Glucose and galactose which were not detected in the dry seeds became readil available after soaking in both enzyme miture and distilled water. Although there was reduction in the nutritional composition of both milk samples, reduction of phytic acid and trypsin inhibitor is beneficial to the consumers. The result of the sensory evaluation showed that the milk prepared from enzyme-treated soybean seeds was rated better in terms of flavour, texture, appearance and palatability.
6. Sanni, A.I., Onilude, A.A. and Fatungase, M.O. (1998). Production of sour maize using starter cultures. World Jour. Microbiol and Biotechnol. 14 (1) 101 - 106.
Eight lactic acid bacteria were isolated from fermenting maize meal. They were identified as Lactobacillus brevis, L. casei, L. ferentum, Pediococccus acidilacti, P. pentosaceus, Lactobacillus spp. I and Pediococcus spp. I and II. L. brevis and Lactobacillus spp. I isolated from the spontaneously fermented maize meal together with L. brevis isolated from rye sourdough and L. plantarum from ogi, a fermented maize gruel, were selected as starter organisms. There was a decrease in the final pH from 4.9 to 3.8 and an increase in the cid equivalent and temperature of the spontaneously-generated sour maize meal at the end of 24 h fermentation. There was a decrease in the pH and moisture of the sour maize breads relative to the conventional wheat bread. An improvement in the shelf-life of the bread samples was also obtained. Crude protei values of the sour maize breads were between 4.36% and 8.87%, while crude fat contents ranged between 3.66% to 7.6%. The ash contents increased from 2.29% to 2.54% while total carbohydrate values were between 46.31% and 65.3%. Calcium, phosphorus and potassium contents ranged from 0.015, 0.26 and 0.018% to 0.036, 0.47 and 0.036% respectively. Physical examination of the bread samples showed that all were cracked and relatively hard. Weight, height and volumes ranged from 316 to 380 g; 4.2 to 5.2 cm and 200 to 320 cm3 respectively. Statistical analysis of the sensory attributes revealed a consumer acceptance of the sour maize breads, although ranking test showed preference for the baker’s yeast leavened bread that served as control.
7. Sanni, A.I., Morlon-Guyot, J.P and Guyot J.P (2002). New efficient amylase- producing strains of Lactobacillus plantarum and L. fermentum isolated from Nigerian traditional fermented foods. Inter. Jour. Food Microbiology 72, 53-62.
Amylolytic lactic acid bacteria (ALAB) were isolated from Nigerian traditional fermented foods (fufu, burukutu, ogi-bab and kunu-zakki) with the aim of selecting efficient amylase-producing strains. Nine isolates were characterized on the basis of their phenotypic and taxo-molecular characteristics. Three groups could be distinguished by their fermentation profiles and this was confirmed by DNA restriction analysis. Though fermentation profiles gave good identification of strain K9 (unique representative of group III) as Lactobacillus fermentum, they could not be used to ascertain the taxonomic position of strains of groups I and II. Analysis of partial 16S rRNA sequences led to the identification of these groups as L. plantarum strains and confirmed the species of strain K9 as L. fermentum. The two distinct phenotypic groups of L. plantarum differed in their use of D-xylose, L-arabinose, melibiose and were different from the previously described amylolytic L. plantarum A6 isolated from retted cassava in Congo. L. fermentum K9 was different from L. fermentum OgiE1 and Mw2 isolated from Benin maize sourdough and it is the first amylolytic L. fermentum described from Nigerian fermented products. Enzymatic profiles showed some differences between the strains of a similar fermentation group. One of the most relevant characteristics of the isolates was a higher yield of amylase production than those reported previously described ALAB grown under the same conditions. Furthermore, all isolates were tolerant to an exposure at pH 2 and to bile salts.
8. Oguntoyinbo, F. A., Sanni, A. I., Franz, C. M. A. P. And Holzapfel, W. H. (2007).
In-vitro fermentation studies for selection and evaluation of Bacillus strains as
starter cultures for the production of okpehe, a traditional African fermented condiment
Inter. J. Food Microbiol. 113, 208 – 218.
Selected Bacillus and Enterococcusstrains, isolated from traditional okpehe fermentations, were studied for their suitability as starter cultures in laboratory-scale fermentations ofProsopis Africana seeds for the production of okephe, a traditional fermented vegetable product of Nigeria. The strains were selected on the basis of highest proteolytic activity, as determined with the APIZYM (BIOMerieux) test. The choice of starter strains was narrowed to Bacillus subtilis trains BFE 5301 and BFE 5372. These were determined as the best starter combination because of rapid growth, high amylolytic and poteolytic activities, high levels of polyglutamic acid production by strain BFE 5372, as well as bacteriocin production by strain BFE 5372. Other mixed culture fermentations did not yield sensoricallyacceptable products. Although a monoculture fermentation, using only B. subtilis BFE 5372, produced okpehe with very good sensory characteristics, the growth of B. cereus could be detected after 48 h fermentation, indicating that this starter did not sufficiently contribute to product safety. Mixed cuture fermentation with the combination of bacteriocin-producing starter B. subtilis BFE 5301 and the non-bacteriocin-producing B. subtilis BFE 5372, produced a product with good sensory characteristics, in which growth of B. cereus was delayed. The bacteriocin produced by B. subtilis strain BFE 5301 was identified as subtilisin, using subtilisin-specific primers and PCR amplification of he subtilisin gene. The bacteriocin was heat-stable at 100 °C for 10 min and exhibited highest activity at pH values lower or equal to pH 6.0. The bacteriocin was sensitive to the proteolytic enzymes trypsin and α-chymotrypsin at concentrations of 10 mg/ml.
9. Oguntoyinbo, F. A. and Sanni, A. I. (2007). Determination of toxigenic potentials of Bacillus strains isolated from okpehe, a Nigerian fermented condiment. World J. Microbiol. Biotechnol. 23, 65 – 70.
The toxigenic potential of Bacillus species isolated from the traditional fermented condiment okpehe was determined; this aimed at selection of non-toxigenic bacilli as starter cultures to bring about production of safe product. B. subtilis and B. cereus strain isolated from okpehe were evaluated for their possible possession of virulence characteristics. Fifty isolates were screened for their ability to produce diarrhoea enterotoxin by reversed passive latex agglutination (BCET-RPLA) test kit; the results showed that 40% of the B. cereus strains were toxigenic. The ability of selected isolates to compete in situ and in vitro toxin production during the fermentation was also determined. The enterotoxin was not detected using BCET-RPLA kit in the spontaneously fermented samples of okpehe, but the toxin was detected in the okpehe samples fermented using B. cereus enterotoxin producer in mixed starter culture fermentation. The PCR amplification of virulence genes revealed that Bacillus cereus and B. licheniformis, a strain from the B. subtili group, contained DNA sequences encoding the haemolysin BL (hblD) enterotoxin complex. The growth ability of B. cereus strains to high population during the fermentation during the fermentation and the presence of detectable diarroheagenic genes in B. cereus and B licheniformis showed that strains carrying virulence characteristics cannot be totally ruled out in traditionally fermented okpehe.
10. A. Oguntoyinbo, M. Huch, G. Cho. U. Schillinger, W. H. Holzapfel, A. I. Sanni and C. M.
A. P. Franz (2010). Diversity of Bacillus species isolated from Okpehe, a traditional
fermented soup condiment from Nigeria. J. Food Protection 73 (5), 870-878.
The diversity of Bacillus species isolated from the fermented soup condiment okpehe in Nigeria was studied using a combination of phenotypic and genotypic methods. Fifty strains presumptively characterized as Bacillus spp. using the API 50 CHB test were further identified by PCR of randomly amplified polymorphic DNA (RAPD) and by amplified ribosomal DNA restriction analysis (ARDRA) genotyping methods. ARDRA fingerprinting with HhaI, HinfI and Sau3AI restriction enzymes did not allow successful differentiation between the Bacillus species, except for distinguishing B. cereus from other Bacillus species. This problem was overcome with the combination of RAPD PCR and ARDRA genotypic fingerprinting techniques. Sequencing of 16S rRNA genes of selected strains representative of the major clusters revealed that the Bacillus strains associated with this fermentation were B. subtilis, B. amyloliquefaciens, B, cereus and B. licheniformis (in decreasing order of incidence). The presence of enterotoxin genes in all B. cereus strains was demonstrated by multiplex PCR. The high incidence of detection (20%) of possibly pathogenic B. cereus strain that contained enterotoxin genes indicated that these fermented foods may constitute a potential health risk.
Selected Conferences/Workshops Attended
1999. Organized by University of Ghana USAID BEAN/COWPEA
Collaborative Research Support Program and University of Georgia, USA.
5. Guest Lecturer, “Biotechnology and its Potential for the Development of Sustainable Food Systems in Nigeria”. – Paper presented at the “39th Annual Conference of Science Association of Nigeria”. November 25-29, 2001.
6. Facilitator, University of Ibadan Postgraduate School Workshop on “Planning and Writing of Grant-Oriented Research Proposals” July 14-17, 2003, Ibadan, Nigeria.
7. Guest Speaker, “Towards Enhancing Academic Research, Reporting and Publication Skill InThe Academia” Paper presented at the “Babcock University Colloquium, August 11-17, 2003 held at Babcock University, Ogun State, Nigeria.
8. Chairman, 1st Scientific Session, Conference of Nigerian Biotechnology Society, May 20-22nd 2004, Ondo State University, Ado-Ekiti, Nigeria.
9. Invited Participant, National Curriculum Development Workshop on Entrepreneurial Studies, June 22-24, 2004, National University Commission, Abuja, Nigeria.
10.Facilitator, International Advanced E-Learning Workshop on “Management
of Microbiology Hazards in Foods” Bells University of Technology, Ota,
Nigeria and Wageningen Business School, The Netherlands on 11th -15th
January, 2010 at Bells University of Technology Campus.
11. Guest Speaker, “Developing Successful Research Proposals” being a paper
presented at the EU-ACP Science and Technology Project –Developing
Research Capacity among African Environmental Scientists (DRECA), 31st
August – 3rd September, 2010, Ibadan, Nigeria
12. Guest Speaker, “Pains and Gains of Research” being a paper presented at the
Orientation Programme for the New Postgraduate Students, Department of
Physiology, College of Medicine, 21 April, 2011.
13. Guest Speaker, “Flavour and Palatability Properties of Nigerian Traditional
Fermented Condiments” being a paper presented at a Seminar organized by West
African Seasoning Company Limited, Nigeria. Sheraton Hotel, Abuja, June 13th,
2012.
14. Guest Speaker, “Influence of Soil and Water Pollution on Microbial Diversity and
Functions” being a paper presented at the 2012 Wesley University of Science and
Technology Annual National Conference, Ondo, Nigeria, July 30 – August 3, 2012.
15. Guest Speaker, “Mitigating the Harmful Effects of Waste Materials on the
Environment and People: Prospects of Exploring the Diverse Microbiome of the Soil”
being a paper presented at the 2013 Wesley University of Science and
Technology Annual National Conference, Ondo, Nigeria, August 20 – August 24,
2013.
Names and Addresses of 3 referees
Prof. B.A. Oso ( Ph.D Supervisor, now retired)
Adjunct Professor, Department of Microbiology
Afe Babalola University, Ado-Ekiti, Nigeria.
Mobile: 234-2-8023739043
Prof. Goran Molin
Department of Food Technology, Chemical Center
University of Lund, P.O. Box 124, SE -221 00
Lund, Sweden,
E-mail; goran.molin@livsteki.lth.se
Prof. A. O. Togun
Department of Crop Protection & Environmental Biology
University of Ibadan, Nigeria.
E-mail: aotogun@yahoo.com
Mobile: 234-8033251492
Professor of Food Microbiology & Biotechnology
Department of Microbiology
University of Ibadan, Nigeria.
Fax: 234-2-8103043
E-mail: abiodun.sanni@ui.edu.ng
Phone: 234-8023341920
CURRICULUM VITAE
1. Full Name Abiodun Isiaka SANNI
2. Date of birth 23rd May, 1959
3. State of Origin Osun State
4. Marital Status, number and ages of children Married, 1, 15 years
5. Academic Qualifications
(a) WASC Division 1 (June, 1974), WAEC, Yaba, Lagos, Nigeria
(b) B.Sc. (Botany) 2nd Class Upper Division (July, 1980), University of
Jos, Nigeria
(c) M. Sc. (Microbiology) (Sept., 1982), University of Ibadan, Nigeria
(d) PhD. (Microbiology) (Nov., 1985), University of Ibadan, Nigeria
Professional Qualifications and Diploma
(a) Certificate in Food Irradiation Technology (IAEA/FAO, 1990
Netherlands)
(b) Modular Certificates in Higher Education Pedagogy (Sept. 2003-
July 2004)
Learning in Higher Education
ix. Special: Writing Grant-Winning Proposals
6. Academic Distinctions
(a) Federal Government Postgraduate Scholarship 1982 - 1985
(b) University of Ibadan Postgraduate Scholar 1982 - 1985
(c) Guest Scholar, University of Lund, Sweden 1990 - 1991
(d) Research Scientist, IRD, Montpellier, France May 17 - Nov 17, 2000
(e) Georg Forster Research Fellow – Av Humboldt Nov 2004 –Oct 2005
(f) Av Humboldt African Research Initiative Fellow Oct-Dec. 2008
7. Teaching, Research, Administrative and Managerial Experience
Lecturer II, Lagos State University, Nigeria 1984-1987
Lecturer II, University of Ibadan, Nigeria 1988-1991
Lecturer I, University of Ibadan, Nigeria 1991-1994
Senior Lecturer, University of Ibadan, Nigeria 1994-1999
Visiting Scholar, University of Ghana, Accra, Ghana 1998-1999
Professor, University of Ibadan, Nigeria 1999-till date
External Examiner/Assessor of M.Sc, MPhil and Ph.D Theses
University of Ghana, Accra, Ghana, University of Lagos, Nigeria, Ahmadu Bello University, Nigeria, Tafawa Balewa University, Bauchi, Nigeria, Ekiti State University, Ado Ekiti, Nigeria, Adekunle Ajasin University, Akungba, Nigeria, University of Benin, Nigeria, Ambrose Alli University, Nigeria, University of Agriculture, Umudike, Nigeria, University of Agriculture, Abeokuta, Nigeria, Federal University of Technology, Owerri, Nigeria , University of Port-Harcourt, Nigeria, University of Ilorin, Nigeria, Bells University of Technology, Sango-Ota, Ogun State, Nigeria, North West University, South Africa.
8. Membership of Learned Societies, Committees and Boards
Member, Nigerian Society for Microbiology
Member, New York Academy of Science
Member, Biotechnology Society of Nigeria
Member, Science Association of Nigeria
Member, University Central Appointment & Promotion Committee 2000-2004,
2005-2011
Member, Faculty of Science A & P Committee
Member, University of Ibadan Linkage Board
Member, Award Board, Quality Management Development Institute, Nigeria.
Courses Taught
(a ) University of Ibadan
Department of Microbiology (formerly Dept. of Botany & Microbiology)
Undergraduate Level:
MIC 221- Introductory Microbiology
MIC 322 - Bacteriology
MIC 324 – Environmental Microbiology
MIC 424 – Microbial Physiology and Met
Postgraduate Level: MIC 721 - Advanced Bacteriology
MIC 724 - Microbiological Quality Control
MIC 725 - Microbial Ecology
MIC 726 - Industrial Microbiology
Department of Food Technology (Postgraduate)
TFT 703 – Fermentation Technology
Department of Pharmaceutical Microbiology (Postgraduate)
PHM 711 – Advanced Bacteriology
PHM 714 – Biotechnology in Pharmacy
(b) University of Ghana, Accra, Ghana
Undergraduate Level:
FDSC 301 - General Microbiology
FDSC 401 - Food Microbiology
FDSC 403 - Industrial Microbiology
Postgraduate Level: FDSC 602 - Advances in Microbiology
FDSC 610 – Food Biotechnology
(c) PhD. Theses Supervision
16. Phenotypically-based taxonomy using API 50 CH of Lactobacilli from Nigerian ogi, and the occurrence of starch-fermenting strains (1994). Awarded to Marie-Louise Johansson, Dept. of Food Technology, University of Lund, Sweden.
17. Antimicrobial effects of some medicinal plants on Candida spp. isolated from human oral mucosa (2002). Awarded to Adeleke Osho.
18. Characterization of galactosidases produced by lactic cultures and their effect on soyabean and its milk derivative (2002). Awarded to Rebecca O. Afolabi.
19. Interactions between Striga hermonthica (Del.) Benth and fluorescent rhizosphere bacteria of Zea Mays L. and Sorghum bicolor L. Moench for Striga suicidal germination of Vigna unguiculata (2002). Awarded to Bukola Babalola.
20. Molecular characterization and functional properties of Bacillus spp. isolated from okpehe, a traditional fermented condiment (2003). Awarded to Folarin Oguntoyinbo (in collaboration with Prof. W.H. Holzapfel, Institut fur Hygiene und Toxikologie/BFE, Karlsruhe, Germany).
21. Probiotic and biopreservative properties of lactic acid bacteria isolated from some traditional fermented foods in Nigeria (2003). Awarded to Temitope S. Ogunbanwo.
22. Characterization and functional properties of selected starter cultures for the production of sour maize bread (2003). Awarded to Mojisola Edema.
23. Selection and characterization of Lactobacillus species as probiotic candidates in the control of infantile bacterial gastroenteritis (2004). Awarded to Adenike A.O. Ogunshe.
24. Microbiological and biochemical evaluation of some antibiotic producing Streptomyces spp from different sources (2004). Awarded to Agnes Asagbra.
25. Microbiological and Nutritional Evaluation of Bambara Nut (Vigna subterranean) Tempeh (2008). Awarded to Festus I. Fadahunsi.
26. Characterisation and probiotic properties of lactic acid bacteria isolated from traditional fermented foods in Nigera (2012). Awarded to K. Banwo
27. Molecular characterisation and probiotic properties of Bifidobacteria isolated from human and chicken (2013). Awarded to J.E. Onyibe.
28. Molecular Characterisation and probiotic potentials of predominant Enterococcus gallinarum isolated from traditional fermented condiments and warakansi (2013). Awarded to C.I. Oladipo.
29. Characterisation and nutritional properties of yeasts isolated from traditional fermented foods products in Nigeria (2015). Awarded to O.R. Ogunremi
30. Polyphasic characterization and virulence profile of Listeria monocytogenes isolated from seafoods in Lagos, Nigeria. (2011). A. Amusan – on-going.
Research
(i) Completed
Summary of my completed research works can be categorized as follows:
(a) Microbial Taxonomy
Scientific information was provided on the associated microorganisms of the fermented products studied. Characterization of the microbes using both phenotypic and biochemical methods were carried out. Some of the fermented products and isolates were reported for the first time. Microbial taxonomy is an essential phase in the study of any fermentation process. This is because biotechnological typing of the isolates cannot be done without the knowledge of the identities of the associated microorganisms of any fermenting matrix.
(b) Biochemical Studies
Since fermented foods form a substantial part of the diet in sub-Saharan Africa, research efforts were geared towards providing information on the biochemical status of some of these food products. Some of the papers reported the biological ennoblement resulting from fermentation of the raw materials, while enzyme activities were also monitored. Of note is the effect of galactosidase treatment on soybeans. It was observed that the treatment not only significantly reduced the anti-nutritional constituents of the beans; the soymilk prepared from the treated beans had a ‘vanilla-like’ aroma and acceptable taste, as opposed to the usual off-flavour characteristic of the unfermented and untreated soymilk. Information provided in some of the studies can be advanced to yield economic benefits.
(c) Upgrade of Fermentation Processes
The preparation of fermented foods in sub-Saharan Africa is still a traditional family art based on old recipes transmitted from generation to generation. Research efforts were made to transform the above from the traditional art to science. Some of the works provided steps for optimization of the traditional processes with a view to obtaining consistent product’s quality. The use of starter-cultures (singly and mixed) featured prominently in some of the studies. The production of sour maize bread using lactic starters was regarded as innovative by a reviewer of the journal that published the article. Research studies on development of fermented weaning and adult foods with improved nutritional profile were also carried out. Such food products e.g. Ghanaian Banku, was used for an intervention study to arrest kwashiorkor in a study site in Ghana during my study leave.
(d) Soil and Environmental Microbiology
Few of the works provided information on the continued soil improvement in alley cropping by employing appropriate strains of Rhizobium. The usefulness of this study the farmers in sub-Saharan Africa cannot be over-emphasized. Biotyping of Pseudomonas species that can be further developed as a potential hydrocarbon biodegraders was carried out in one of the studies. However, more studies will need to be carried out to determine their bioremediation ability.
(e) International Collaborative Research
A project on ‘Ogi-Technology of West African fermented food from sorghum and maize’ was funded by SAREC (Swedish Agency for Research Cooperation with Developing Countries) for 3 years in University of Lund, Sweden. The project provided database for small-scale industrial production of ogi by optimizing the processing conditions. Some of the lactic acid bacteria strains identified produced ogi with final pH of less than 4.0 within 6 hours when used as starters. Another project on ‘Development of a cereal-yoghurt based on sorghum’ was equally sponsored by the same Agency for 3 years. Selected probiotic strains of Lactobacillus with ability to colonize human intestinal mucosa, achieve rapid Lactic acid fermentation of sorghum and also inactivate food pathogens, were used as candidate organisms.
In Ghana, the microbiological investigation of some of the works on USAID BEAN / COWPEA Collaborative Research Program of Department of Nutrition and Food Science, University of Ghana and Department of Food Science, University of Georgia, USA was carried out.
In the Laboratory of Biotechnology (Tropical Microbiology), Institute for Research and Development, Montpellier, France, efforts to characterize amylolytic lactic acid bacteria isolated from traditional fermented foods in Nigeria using physiological and amplified fragment length polymorphism fingerprint analysis, formed the main focus of our collaboration.
In the Institute für Hygiene und Toxikologie/BFEL, Germany, a 12- month Research Fellowship of Alexander von Humboldt was on “Characterization of Lactic Acid bacteria as starter cultures for the production of traditional fermented foods with health-promoting feature in sub-Saharan Africa” The specific objectives were: taxonomic characterization of LAB strains isolated from traditional fermented foods in Nigeria using molecular techniques such as restriction enzyme analysis (REA), pulsed-field gel electrophoresis, amplified fragment length polymorphism(AFLP), and or randomly amplified polymorphic DNA (RAPD) based on polymerase chain reaction (PCR); screening and characterization of the bacteriocins produced by the selected strains; determination of acidification potential, enzymatic activities, detection of health-promoting features such as barrier/restoration effects on diarrhoea, adherence and colonization resistance, stimulation of immune system, fermentation studies for the production of “health sogurt” etc.
(ii) In Progress
Characterisation of antimicrobial compounds, hydrolytic enzymes, and bacteriocin from
Lactic acid bacteria from traditional fermented foods; Identification and
biotechnological characterization of food yeasts; starter culture development for small-
scale fermentation in developing countries.
(f) Departmental and University Responsibilities
Departmental Postgraduate Coordinator, University of Ibadan 1988 - 1996
Departmental Time-Table coordinator, University of Ibadan 1988 - 1990
Departmental Seminar Coordinator, University of Ibadan 1991 - 1996
Coordinator, Departmental Research and Development Committee 1996 till date
Member, Faculty of Science Consultancy Committee, University
of Ibadan, Nigeria 1991-1993
Chairman, Departmental Fund Raising Committee, University
of Ibadan, Nigeria 1999
Member, University Central Appointment and Promotion
Committee, University of Ibadan, Nigeria 2000–2004, 2005-2011
Resource person, University of Ibadan PG School 2003 – 2007
Member, University Linkage Board 2004 – 2010
FUNDED RESEARCH PROJECTS
1. “Ogi – technology of West African fermented food from sorghum
and maize” (Funded by Swedish Agency for Research Cooperation
with Developing Countries –SAREC, Sweden) 1990 – 1993.
2. “Characterization of lactic acid bacteria from Nigerian traditional
Fermented Foods” (University of Ibadan Senate Research Grant)
1993 – 1994.
3. “Development of “cereal yoghurt” – Microbiological and
Technological Properties (Funded by Swedish Agency for Research
Cooperation with Developing Countries –SAREC, Sweden) 1994 - 1996.
4. “Screening for amylolytic lactic acid bacteria from Nigerian traditional
Fermented foods” (University of Ibadan Senate Research Grant)
1997 – 1998.
SELECTED PROFESSIONAL ACTIVITIES
Member, Accreditation Panel to Private Universities set up by National
Universities Commission (NUC), Nigeria – 2003.
Resource Person, Workshop on Entrepreneurial Studies in Nigerian Universities, organised by NUC, 2004.
Resource Person, Workshop on Review of Undergraduate Courses, organised by
NUC, 2004.
Certified Accreditor to Nigerian Universities 2001 till date.
9. Scholarly Publications
(a) Chapters in Books Already Published
1a. Sanni, A.I. 1992. Viruses. In Readings in Diversity of Plants. John West Publications, Lagos, Nigeria.
1b. Sanni, A.I. 1992. Bacteria. In Readings in Diversity of Plants. John West Publications, Lagos, Nigeria.
2. Ogundipe, G.A.T., Lucas, E.O. and Sanni, A.I. 2005. Systematic Collection of Data. In: Methodology of Basic and Applied Research (ISBN 978-37168- -1). (Eds. A.I. Olayinka, V.O. Taiwo, A. Raji-Oyelade and I.P. Farai) Published by: The Postgraduate School, University of Ibadan, Nigeria.
3. Sanni, A.I. 2006. Some Guidelines for Writing Journal Articles in the Basic Sciences. In:
Scholarly Writing and Publication (ISBN 976-38570-6-1) (Ed. A.I.Olayinka, Adetimirin and A. Ojebode). Published by: The Postgraduate School, University of Ibadan, Nigeria.
4. Sanni, A.I. and Oguntoyinbo, F.A. (2014) Diversity of Foods Involving Alkaline Fermentation. In: Handbook of Indigenous Foods Involving Alkaline Fermentation (Ed. M.J.R. Nout and P. Sarkar). Taylor and Francis Group, USA (
(b) Journal Articles
1. Sanni, A. I. (1988). Enzyme studies during the production of agadagidi: Amylase activities. Die Nahrung 32 (2), 159-161.
2. Sanni, A. I. (1988). Enzyme studies during the production of agadagidi: Invertase activities. Die Nahrung 32 (2), 163-168.
3. Sanni, A.I. and Oso, B.A. (1988). Nutritional studies on agadagidi. Die Nahrung 32 (2), 169-172.
4. Sanni, A. I. and Oso, B.A. (1989). The production of agadagidi, a Nigerian fermented alcoholic beverage. Die Nahrung 32 (2), 319-326.
5. Sanni, A.I. (1989). Some environmental and nutritional factors affecting growth of associated microorganisms of agadagidi. J. Basic Microbiology 29 (9), 617-622.
6. Sanni, A.I. (1989). Chemical studies on sekete beer. Food Chemistry. 33,187-191.
7. Sanni, A.I. and Ogbonna, D.N. (1991). The production of owoh, a Nigerian fermented soup condiment from cotton seeds. Food Microbiology 8, 223 - 229.
8. Sanni A.I. and Ogbonna, D.N. (1992). Biochemical studies on owoh, a Nigerian fermented soup condiment from cotton seeds. Food Microbiology 9, 177-183.
9. Sanni, A.I. (1993). The need for process optimization of African fermented foods and beverages. Inter. Jour. of Food Microbiology 18, 85 - 95.
10. Sanni, A.I. (1993). Biochemical changes during the production of okpehe, a Nigerian fermented food condiment. Chem. Microbiol.Technol Lebensm 15 (3/4), 97-100.
11. Sanni, A.I., Lie, E. and Lindberg, A.M. (1993). Fatty acid composition of Prosopis africana and its fermented product, okpehe. Chem. Microbiol. Technol. Lebensm 15 (3/4), 89 - 90.
12. Sanni, A.I., Lonner, C. (1993). Identification of yeasts isolated from Nigerian traditional alcoholic beverages. Food Microbiology 10, 517 - 523.
13. Sanni, A.I., Lonner, C., Marklinder, I., Johansson, M-L and Molin, G. (1994). Starter cultures for the production of ogi, a fermented infant food from maize and sorghum. Chem. Microbiol. Technol. Lebensm 16 (1/2), 29 -33.
14. Johansson, M.L., Sanni, A.I., Lonner, C. and Molin, G. (1995). Phenotypically -based taxonomy using API 50 CH of Lactobacilli from Nigerian ogi, and the occurrence of starch-fermenting strains. Inter Jour. of Food Microbiology. 25, 159-168.
15. Sanni, A.I., Ahrne, S and Onilude, A.A. (1995). Alpha-galactosidase production by six strains of Lactobacillus plantarum isolated from diverse sources. Jour of Basic Microbiol. 35 (6), 427 - 432.
16. Sanni, A.I., Fapohunda, E.M. and Onilude, A.A. (1995). Characteristic properties of lactic acid bacteria isolated from rumen of maradi goats. Chem. Microbiol. Technol. Lebensm. 17 (3/4), 99 - 104.
17. Sanni, A.I., Onilude, A.A. and Mbandi, E. (1996). Production of vinegar from pineapple using starter cultures. Nig. Food Jour. 14, 37 - 41.
18. Sanni, A.I., Onilude, A.A; and Ogundoye, D.R. (1997). Effect of bacterial galactosidase treatment on the nutritional status of soybean and its milk derivative. Die Nahrung- Food. 41 (1), 18 - 21.
19. Sanni, A.I. and Onilude, A.A. (1997). Effect of temperature on the ethanol tolerance of yeasts isolated from traditional alcoholic beverages. Jour. of Sci. Research 3 (1) 75 - 77.
20. Sanni, A.I. and Ekunsanmi, J.T. (1997). Physiological studies on osmophilic yeasts isolated from some high sugar substrates. Jour. of Sci. Research 3 (1) 61 -65.
21. Sanni, A.I., and Onilude, A.A. (1997). Polygalaturonase production by L. plantarum OW 14 isolated from ogi. Jour. of Sci. Research 3(1) 78 -81.
22. Sanni, A.I. and Onilude, A.A. (1997). Characteristics of Bacillus spp. isolated from okpehe, a fermented soup condiment from Prosopis africana. Nig. Jour. Sci. 31 (1), 49 - 52.
23. Sanni, A.I., Onilude, A.A. and Ibidapo, O.T. (1998). Biochemical composition of infant weaning food fabricated from fermented blends of cereal and soybean. Food Chemistry 65 (1), 35 - 39.
24. Sanni, A.I., Onilude, A.A. and Oguntoyinbo, F.A. (1998). Optimization of process conditions for owoh, a fermented cotton seed condiment. Adv. Food Sci. (CMTL) 20 (5/6), 163 - 167.
25. Sanni, A.I., Onilude, A.A. and Fatungase, M.O. (1998). Production of sour maize bread using starter cultures. World J. Microbiol Biotechnol. 14 (1), 101 - 106.
26. Sanni, A.I., Onilude, A.A., Mulongoy, K and Ojeifo, A.A. (1998) Survival and persistence of Rhizobium strains in tropical alley cropping. Nig. Jour. Sci. 32 (1), 59 - 70.
27. Ekwenye, U. N. and Sanni, A. I. (1998) Characterization of yeasts isolated from fruits, honey and jam. Global Jour. of Pure & Appl. Sci. 4, 375-380.
28. Sanni, A.I., Onilude, A.A. and Ibidapo, O.T. (1999). Physico-chemical characterization of formulated infant and adult food. Lebens. Unters Forsch-A 203 (13), 221 - 224.
29. Sanni, A.I., Onilude, A.A. and Adeleke, E.O. (1999). Nutritional composition of lactic acid fermented cowpea milk. Lebens. Unters Forsch-A 203 (3) 225 - 229.
30. Sanni, A.I., Onilude, A.A., Ogunbanwo, S.T and Smith, S.I. (1999). Antagonistic activity of bacteriocin produced by Lactobacillus spp. from ogi, an indigenous fermented food. J. Basic Microbiol. 39 (3), 189 - 195.
31. Sanni, A.I., Onilude, A.A. and Momoh, M.O. (1999). Selection of starters and a starter-mediated novel procedure for production of wara, a West African soft cheese. Inter. Jour. Food Sci. and Technol. 34, 325 - 333.
32. Sanni, A.I., Onilude, A.A., Fadahunsi, I.F. and Afolabi, R.O. (1999). Microbial deterioration of traditional alcoholic beverages in Nigeria. Food Research Intern. 32, 163 - 167.
33. Sefa-Dedeh, S., Sanni, A.I., Tetteh, G. and Sakyi-Dawson, E. (1999). Yeasts in the traditional brewing of pito in Ghana. World Jour. Microbiol. Biotechnol. 15 (5), 593 - 597.
34. Sanni, A.I., Onilude, A.A., Ogodo, O.O. and Fadahunsi, I.F. (1999). Production of intracellular proteinase by Lactobacillus spp. isolated from indigenous fermented foods. Nig. Jour. Sci. 33, 333 - 341.
35. Onilude, A.A., Sanni, A.I. and Ogunbanwo, S.T (1999). Drug resistance plasmids in Lactobacillus spp. isolated from ogi, a Nigerian fermented cereal food. Nig. Jour. Sci. 33, 299 - 309.
36. Onilude, A.A., Sanni, A.I., and Ighalo, M.I. (1999). Effect of process improvement on the physico-chemical properties of infant weaning food from composite blends of cereal and soybeans. Plant Foods for Human Nutr. 54, 239 - 250.
37. Sanni, A.I., Sefa-Dedeh, S., Sakyi-Dawson, E., and Asiedu, M. (1999). Effect of processing conditions on the viscosity, in vitro protein and starch digestibility of ogi-baba, a Nigerian fermented sorghum gruel .Proceedings of the International Workshop on Cowpea Processing and Utilization. January, 1999, University of Ghana, Accra, Ghana. pp. 23 – 28.
38. Sanni, A.I., Sefa-Dedeh, S., Sakyi-Dawson, E., and Asiedu, M. (1999). Microbiological evaluation of cowpea - fortified Ghanaian fermented Maize dough. Proceedings of the International Workshop on Cowpea Processing and Utilization. January, 1999, University of Ghana, Accra, Ghana. pp. 80 - 86.
39. Sanni, A.I., Ayernor, G.S and Sakyi-Dawson, E. and Sefa-Dedeh, S. (2000). Aerobic spore-forming bacteria and chemical composition of some Nigerian fermented soup condiment. Plant Foods for Human Nutr. 55, 111-118.
40. Sanni, A.I., Ohenhen, R.E. and Onilude, A.A. (2000) Production of extracellular proteinase by Lactobacillus species isolated from traditional alcoholic beverage. Nigerian Jour. of Microbiology 14 (1), 55-61.
41. Sanni, A.I., Asiedu, M. and Ayernor, G.S (2001). Influence of processing conditions on the nutritive value of ogi-baba, a Nigerian fermented sorghum gruel. Plant Foods for Human Nutr. 56, 217-223.
42. Falegan, C.R., Arowolo, J.A., Fagbohun, E.D. and Sanni, A.I. (2001). Antimicrobial activities of Lactobacillus plantarum isolated from palm wine and burukutu. African Jour. of Sci. 1, 30-37.
43. Sanni, A.I., Morlon-Guyot, J. and Guyot J.P (2002). New efficient amylase- producing strains of Lactobacillus plantarum and L. fermentum isolated from Nigerian traditional fermented foods. Inter. Jour. Food Microbiology 72, 53-62.
44. Onilude, A.A., Sanni, A.I., Olaoye, O.A. and Ogunbanwo, S. T. (2002). Influence of lactic cultures on the quality attributes of tsire, a West African stick meat. World J. Microbiol. Biotechnol. 18, 615-619.
45. Oguntoyinbo, F. A., Onilude, A.A. and Sanni, A.I. (2001). Microflora and proximate composition of okpehe, a fermented condiment from Prosopis africana seeds. Adv. Food Sci. 23, 165-170.
46. Sanni, A.I., Onilude, A.A., Ogunbanwo, S.T., Fadahunsi, I. F. and Afolabi, R.O. (2002). Production of exopolysaccharide by lactic acid bacteria isolated from traditional fermented foods in Nigeria. Euro. Food Res. Technol 214, 405-407.
47. Asiedu, M and Sanni, A.I. (2002). Chemical composition and Microbiological changes during spontaneous and starter culture fermentation of Enam Ne Setaakye, a West African fermented fish-carbohydrate product. Euro. Food Res. Technol. 215, 8-12.
48. Sanni, A.I., Onilude, A.A., Fadahunsi, I.F., Ogunbanwo, S.T and Afolabi, R.O. (2002). Selection of starter cultures for the production of ugba, a fermented soup condiment. Euro. Food Res. Technol. 215 (2) 176-180.
49. Sanni, A.I., Sefa-Dedeh, S., Sakyi-Dawson, E and Asiedu, M. (2002). Microbiological evaluation of Ghanaian maize dough co-fermented with cowpea. Int. Jour. Food Sci. and Nutrition 53 (5), 367-373.
50. Sanni, A.I., Ayernor, G.S. and Asiedu, M. (2002). Microflora and chemical composition of momoni, a Ghanaian fermented fish condiment. Jour. Food Comp. and Analysis 15 (5), 577-583.
51. Sanni, A.I., Onilude, A.A., Ogunbanwo, S.T. and Fadahunsi, I. F.(2003). Growth and acid production of lactic acid bacteria in cowpea milk. Research Communications in Microbiology 1(1), 40-45.
52. Babalola, O.O., Osir, E.O. and Sanni, A.I. (2002). Characterization of potential ethylene-producing rhizosphere bacteria of Striga-infested maize and sorghum. Afr. J. Biotechnol. 1(2) 67-69.
53 Ogunbanwo, S.T., Sanni, A.I. and Onilude A.A. (2003) Influence of cultural conditions on the production of bacteriocin by Lactobacillus brevis OG1. Afr. J. Biotechnol. 2 (7), 179-184.
55. Ogunbanwo, S.T., Sanni, A.I. and Onilude A.A. (2003) Characterization of bacteriocin produced by Lactobacillus plantarum F1 and L. brevis OG1. Afr. J. Biotechnol. 2 (8), 219-227.
56. Babalola, O.O., Osir, E.O., Sanni, A.I., Odhiambo, G.D and Bulimo, W.D. (2003). Amplification of 1-amino-cyclopropane-1-carboxylic (ACC) deaminase from plant growth promoting rhizobacteria in Striga-infested soil. Afr. J. Biotechnol 2 (6), 157-160.
57. Sanni, A.I., Onilude, A.A.., Fadahunsi, I. F. and Ogunbanwo, S.T (2002). Microbiology and amino acid composition of sekete beer. Research Communications in Food Science 1 (1) 29-35.
58. Sanni, A.I., Onilude, A.A., Ogunbanwo, S.T and Fadahunsi, I. F. (2002). Growth and acid production of lactic acid bacteria in cowpea milk. Research Communications in Food Science 1 (1) 40 - 45.
59. Ogunbanwo, S.T., Sanni, A.I. and Onilude A.A. (2004) Influence of bacteriocin in the control of Escherichia coli infection of broiler chickens in Nigeria. World J. Microbiol. Biotechnol . 20, 51-56.
60. Ogunbanwo, S.T., Sanni, A.I. and Onilude A.A. (2004) Effect of bacteriocinogenic Lactobacillus spp. on the shelf life of fufu, a traditional fermented cassava product. World J. Microbiol. Biotechnol. 20, 57-63.
61. Babalola, O. O., Sanni, A.I. and Odhiambo, G.D. (2004). Isolation of rhizobacteria associated with maize and assessment of their potential for use in Striga hermonthica (Del.). Benth. suicidal germination J. Tropical Microbiology 3 (1), 64 –70.
62. Onilude, A. A., Sanni, A. I. and Ighalo, M. I. (2004). Process upgrade and the microbiological, nutritional and consumer acceptability of infant weaning food from fermented composite blends of cereals and soybean. J. Food , Agric & Environ 2, 64-68.
63. Asagbra, A. E., Sanni, A. I. and Oyewole, O. B. (2005) Solid-state fermentation production of tetracycline by Streptomyces strains using some agricultural wastes as substrate. World J. Microbiol. Biotechnol . 21, 107-114.
64. Edema, M.O., Sanni, L. O. and Sanni, A. I. (2005) Evaluation of maize-soybean flour blends for sour maize bread production in Nigeria. Afr. J. Biotechnol. 4 (9), 911-918.
65. Edema, M.O. and Sanni, A. I. (2006) Micro-population of fermenting maize meal for sour maize bread production in Nigeria. Nig. J. Microbiol 20 (2) 937 – 946.
66. Asagbra, A. E., Sanni, A. I. and Oyewole, O. B. (2006) Improvement of tetracycline production by Streptomyces sp. OXC1 in medium containing organic nitrogen and lipids. Inter. J. of Biosciences 3 (4) 7-14.
67. Oguntoyinbo, F. A. and Sanni, A. I. (2007a).Determination of toxigenic potentials of Bacillus strains isolated from okpehe, a Nigerian fermented condiment. World J. Microbiol. Biotechnol. 23, 65 – 70.
68. Oguntoyinbo, F. A., Sanni, A. I., Franz, C. M. A. P. and Holzapfel, W. H. (2007b). Phenotypic diversity and technological properties of Bacillus subtilis species isolated from okpehe, a traditional fermented condiment. World J. Microbiol. Biotechnol. 23, 401 – 410.
69. Oguntoyinbo, F. A., Sanni, A. I., Franz, C. M. A. P. And Holzapfel, W. H. (2007c). In-vitro fermentation studies for selection and evaluation of Bacillus strains as starter cultures for the production of okpehe, a traditional African fermented condiment Inter. J. Food Microbiol. 113, 208 – 218.
70. Asagbra, A. E., Sanni, A. I. and Oyewole, O. B. (2006) Characterization and fermentation studies on a Streptomyces strain of Nigerian soil origin. Jour. of Industrial Research & Technol. 1, 1-9.
71. Edema, M.O. and Sanni, A.I. (2008). Functional properties of selected starter cultures for sour maize bread. Food Microbiol. 25, 616-625.
72. Oguntoyinbo, F.A., Huch, M., Cho., G, Schillinger, U., Holzapfel, W.H., Sanni, A.I. and Franz, C.M.A.P. (2010). Diversity of Bacillus species isolated from Okpehe, a traditional fermented soup condiment from Nigeria. J. Food Protection 73 (5), 870-878.
73. Dike, K.S and Sanni, A.I. (2010). Influence of starter culture of lactic acid bacteria on the shelf life of agidi, and indigenous fermented cereal product. Afr. J. Biotechnol 9 (46), 7922 – 7927.
74. Fadahunsi I.F. and Sanni, A.I. (2010) Chemical and biochemical changes in Bambara Nut (Voandzela subterranean (L) Thours) during fermentation to “tempeh”. EJEAFChe, 9 (2) 275 – 283.
75. Ogunshe A.A.O., Sanni, A.I. and Olukoya, D.K. (2011). Potential probiotics from faecal specimens of breastfed Nigerian infants as a therapy for bacteria gastroenteritis. Sri Lanka J. Child Health, 40 (3) 116 – 124.
76. Ogunremi, O.R. and Sanni, A.I. (2011). Occurrence of amylolytic and or/ Bacteriocin-producing lactic acid bacteria in ogi and fufu. Annals Food Sci. Technol 12 (1) 71-77.
77. Lawal, A.K., Oso, B.A., Sanni, A.I., Grillo, J.A. and Elemo, G.N. (2011). Production of L-glutamic acid from Bacillus isolates cultivated on agro-industrial waste containing medium. Global Research J. of Microbiol. 1 (3) 043 -055.
78. Banwo, K., Sanni, A., Tan, H. and Tian, Y. (2012). Phenotypic and genotypic characterization of lactic acid bacteria isolated from some Nigerian traditional fermented foods. Food Biotechnology, 26 (2), 124-142.
79. Banwo, K., Sanni, A. and Tan, H. (2012). Technological properties and probiotic potential of Enterococcus faecium strains isolated from cow milk. J. Applied Microbiol. 114, 229-241.
80. Banwo, K., Sanni A. and Tan, H. (2013). Functional properties of Pediococcus species isolated from traditional fermented cereal gruel and milk in Nigeria. Food Biotechnology 27 (1), 39-53.
81. Oladipo, I.C., Sanni, A. and Suarnakar, S. (2013). Phenotypic and genomic characterization of Enterococcus species from some Nigerian fermented foods. Food Biotechnology 27 (1), 14-38.
82. Sanni, A.I., Franz, C. M. A. P., Schilinger, U., Huch, M., Guigas, C and Holzapfel, W. H. (2013) Characterization and technological properties of lactic acid bacteria in the production of “sorghurt”, a cereal-based product. Food Biotechnology 27 (2) 178-198.
83. Edema, M.O. and Sanni, A.I. 2009. Functional properties of sour maize bread started on mixed culture of three indigenous microflora. Proceedings of the 21st Annual Conference of the Biotechnology Society of Nigeria, 16-19 July, 2008. pp. 66-70.
84. Edema, M.O., Sanni, L.O. and Sanni, A.I. 2005. Evaluation of maize-soybean flour blends for sour maize bread production in Nigeria. Afri. J. Biotechnol. 4, 911- 918.
85. Babalola, O.O., Sanni, A.I., Odhiambo, G.D. and Baldwyn, T. 2007. Plant growth-promoting rhizobacteria do not pose any deleterious effect on cowpea and detectable amounts of ethylene produced. World J. Microbiol. Biotechnol. 23, 747-752.
86. Onyibe, J.E., Oluwole, O.B., Ogunbanwo, S.T. and Sanni, A.I. 2013a. Antibiotic susceptibility profile and survival of Bifidobacterium adolescentis and Bifidobacterium catenulatum of human and avian origin in stored yoghurt. Nig. Food J. 31, 73-83.
87. Onyibe, J.E., Asagbra, A.E., Bankole, A.O., Elemo, G.H. and Sanni, A.I. 2013b. Hydrophobicity and autoaggregation of Bifidobacterium species of human and avian origin. Analy. Sci. J. 1, 5-16.
88. Elujoba, R., Banwo, K., Ogunremi, O.R. and Sanni, A.I. 2013. Influence of nixtamlisation, cowpea fortification and fermentation on the microflora and quality attributes of sorghum-ogi (a cereal-based weaning food). Nigerian Journal of Science 47: 73-83.
89. Adegboye B.D., Banwo, K., Ogunremi, O. R. and Sanni, A.I 2014. Probiotic Potentials of Yeasts isolated from Nono (African fermented milk) and Wara (African soft cheese) Advances in Food Sciences 36 (3) 115-124.
90. Onipede, G. O., Banwo, K., Ogunremi, O. R. and Sanni, A.I. 2014. Influence of Lactic Acid Bacteria on the Phytic Acid Content of Sorghum-Ogi (An indigenous cereal gruel) Annals of Food Science and Technology 15 (1) 122-134 .
91. Ikhane, D., Banwo, K., Ogunremi, T. and Sanni, A.I. 2015. Phytochemical and Antimicrobial activities of Methanolic extract of Paullinia pinnata Leaves on some selected bacterial pathogens. Journal of Herbs, Spices and Medicinal Plants, 21: 59-74 DOI:10.1080/10496475.2014.906015.
92. Alakeji, T. P., Banwo, K., Ogunremi, O. R. and Sanni, A.I. 2015. Probiotic and hypocholesterolemic potentials of yeasts isolated from some Nigerian traditional fermented foods. Journal of Microbiology, Biotechnology and Food Sciences, 4(5): 437-441
93. Ogunsakin, A. O., Banwo, K., Ogunremi, O. R. and Sanni, A.I. 2015. Microbiological and Physicochemical Properties of Sourdough Bread from Sorghum flour. International Food Research Journal, 22(6): 2610-2618
94. Ogunremi, O. R., Sanni, A. I. and Agrawal, R. 2015. Hypolipidaemic and antioxidant effects of functional cereal-mix produced with probiotic yeasts in rats fed high cholesterol diet. Journal of Functional Foods, 17: 742-748.
95. Ogunremi, O. R., Sanni, A. I. and Agrawal, R. 2015. Probiotic potentials of yeasts isolated from some cereal-based Nigerian traditional fermented food products. Journal of Applied Microbiology, 119: 797-808.
96. Ogunremi, O. R., Agrawal, R. and Sanni, A. I. 2015. Development of cereal-based functional food using cereal-mix substrate fermented with probiotic strain- Pichia kudriavzevii OG 32. Food Science and Nutrition 3 (6) 488-494.
97. Oladipo, I. C., Sanni, A.I., Chakraborty, W., Chakravorty, S., Jana, S., Rudra, D.S., Gacchui, R. and Swarnakar, S. 2015. Bioprotective potential of Enterococcus gallinarum strains isolated from some Nigerian fermented foods, and of their bacteriocins. Polish Journal of Microbiology 63 (4): 415-422.
98. Oladipo, I. C., Sanni, A.I., Chakraborty, W., Chakravorty, S., Jana, S., Rudra, D.S., Gacchui, R. and Swarnakar, S. 2015. Technological properties of strains of Enterococcus gallinarum isolated from Nigerian traditional fermented foods. Malaysian Journal of Microbiology 11 (1) 1-13.
Ten Publications (including Abstracts) that best reflect my Contributions to Scholarship and Research
Nigerian traditional alcoholic beverages. Food Microbiol. 10, 517- 523.
Forty-nine yeast isolates were picked from 20 samples of five different kinds of Nigerian traditional alcoholic beverages. They were identified by the conventional methods in conjunction with the use of simplified scheme of Deak and Beuchat. Saccharomyces cerevisiae (11 isolates) was isolated from all the beverages while Schizosaccharomyces pombe (1) and S. japonicus (1) wee only isolated from palmwine. Other yeasts included Candida castelii (1), C. fructus (2), C. intermedia (1), C. krusei (3), C. tropicalis (4), Geotrichum candidum (4), Hansenula anomala (2), Kloeckera apiculata (4), Pichia membraefaciens (3), P. ohmeri (1), Saccharomyces chevalieri (1), S. uvarum (1), Kluyveromyces africanus (2), Torulaspora delbruekii (3) and Rhodotorula graminis (3). The distribution of the species in the beverages is shown.
fermented foods and beverages. Inter. Jour. of Food Microbiology 18, 85 – 95.
Many papers have been published on various aspects of African fermented foods and beverages. The emphasis has been on the microorganisms used, and the nutritional status of the products after fermentation. The preparation of these products is still a traditional family art and the fermentation process is by uncontrolled inoculation. This has led to variations in the quality and stability of products. Research efforts in this field are still based on old recipes transmitted from generation to generation due to the fact that the consumers are not easily influenced by innovations, and the apparent lack of biotechnological background.
This paper gives a brief account of the fermentation process of some of the fermented products to show the varied pattern of the microbiology. The unpredictability of the complex microflora implicated in the fermentation, and the lack of adequate knowledge of the associated microbes are discussed.
The paper suggests a member of steps to be taken to optimize the fermentation process as a means of maintaining the peculiar characteristics of each product and establishment of small-scale industrial production.
3. Sanni, A.I., Lonner, C., Marklinder, I., Johansson, M.L and Molin G. (1994) Starter cultures for the production of ogi, a fermented infant food from maize and sorghum. Chem. Mikrobiol. Technol. Lebensm. 16 ((1/2), 29 -33.
Starter cultures were used to ferment maize and sorghum for ogi production either singly or as mixed cultures. L. plantarum, L. jensenii,L. agilis, unidentified Lactobacillus sp., and the yeast Debaryomyces hansenii were used for producing ogi with acceptable organoleptic properties. L. plantarum gives the best result, exhibited the highest acid producing ability, and decreased pH of the fermenting starch suspension from 5.9 to 3.4 within 12 hours with a corresponding lactic acid production of 0.76 g/100 g after 24 hours of fermentation. Production of ogi with a pH below 4.0 within 12 hours employing a single starter cultur is an improvement on the traditional processing that takes 2-3 days to achieve the same pH range. The gelling property and starch stability of the ogi samples are also reported.
4. Johansson, M.L., Sanni, A.I., Lonner, C. and Molin, G. (1995).
Phenotypically-based taxonomy using API 50 CH of Lactobacilli from
Nigerian ogi and the occurrence of starch - fermenting strains.
Inter. Jour. of Food Microbiology 25, 159 - 168.
One hundred and twenty isolates of lactic acid bacteria isolated from ogi and three traditional cereal-based alcoholic beverages from Nigeria, together with 18 reference strains from Swedish sour doughs, and 50 type-and reference strains of mainly Lactobacilus, were phenotypically classified on their fermentation ability of 49 carbohydrates, including soluble starch. Data were examined by Jaccard Coefficient (Sj), Simple Matching Coefficient (Ssm) and unweighted par group algorithm with arithmetic averages (UPGMA). Seven major clusters were defined at the 82% Sj-similarity level (corresponds to the Ssm-level of 91%). Three were identified as Lactobacillus plantarum or L. plantarum,-like (together 41% of the ogi isolates). The others were obligately heterofermentative; Cluster 7 was identified as L. confusus (11% of the ogi isolates). Three minor clusters were identified as L. murinus, L. agilis or L. gallinarium, and Leuconostoc mesenteroides, respectively. The phenotype of the L. plantarum isolates varied within wide limits. Seventeen isolates possessed starch-fermenting capacity. Nine of these were identified as L. plantarum or L. plantarum-like (isolated from ogi); one was identified as Leuconostoc mesenteroides subsp. mesenteroides, and the rest were unidentified non-clustering strains.
5. Sanni, A.I., Onilude, A.A. and Ogundoye, D.R. (1997). Effect of bacterial galactosidase treatment on the nutritional status of soybean and its milk derivative. Die Nahrung- Food 41 (1), 18 - 21.
Four field strains of Lactobacillus plantarum (LS 4, 19, 21, 133) obtained from from fufu (a semi-solid product obtained by boiling fermented cassava-Manihot esculenta Crantz) and a type strain DSM 2017 were grown on different carbon sources to induce galactosidase production. LS 21 produced the highest concentration of α- and β-galactosidase with 0.28µmol/L and 0.28µmol/L respectively on lactose and galactose. Milk obtained from sybean seeds treated with the enzyme mixture for 24 h showed a 99, 98 and 96% reduction respectively in the raffinose, stachyose and sucrose content when comared with the dry soybean seed. Glucose and galactose which were not detected in the dry seeds became readil available after soaking in both enzyme miture and distilled water. Although there was reduction in the nutritional composition of both milk samples, reduction of phytic acid and trypsin inhibitor is beneficial to the consumers. The result of the sensory evaluation showed that the milk prepared from enzyme-treated soybean seeds was rated better in terms of flavour, texture, appearance and palatability.
6. Sanni, A.I., Onilude, A.A. and Fatungase, M.O. (1998). Production of sour maize using starter cultures. World Jour. Microbiol and Biotechnol. 14 (1) 101 - 106.
Eight lactic acid bacteria were isolated from fermenting maize meal. They were identified as Lactobacillus brevis, L. casei, L. ferentum, Pediococccus acidilacti, P. pentosaceus, Lactobacillus spp. I and Pediococcus spp. I and II. L. brevis and Lactobacillus spp. I isolated from the spontaneously fermented maize meal together with L. brevis isolated from rye sourdough and L. plantarum from ogi, a fermented maize gruel, were selected as starter organisms. There was a decrease in the final pH from 4.9 to 3.8 and an increase in the cid equivalent and temperature of the spontaneously-generated sour maize meal at the end of 24 h fermentation. There was a decrease in the pH and moisture of the sour maize breads relative to the conventional wheat bread. An improvement in the shelf-life of the bread samples was also obtained. Crude protei values of the sour maize breads were between 4.36% and 8.87%, while crude fat contents ranged between 3.66% to 7.6%. The ash contents increased from 2.29% to 2.54% while total carbohydrate values were between 46.31% and 65.3%. Calcium, phosphorus and potassium contents ranged from 0.015, 0.26 and 0.018% to 0.036, 0.47 and 0.036% respectively. Physical examination of the bread samples showed that all were cracked and relatively hard. Weight, height and volumes ranged from 316 to 380 g; 4.2 to 5.2 cm and 200 to 320 cm3 respectively. Statistical analysis of the sensory attributes revealed a consumer acceptance of the sour maize breads, although ranking test showed preference for the baker’s yeast leavened bread that served as control.
7. Sanni, A.I., Morlon-Guyot, J.P and Guyot J.P (2002). New efficient amylase- producing strains of Lactobacillus plantarum and L. fermentum isolated from Nigerian traditional fermented foods. Inter. Jour. Food Microbiology 72, 53-62.
Amylolytic lactic acid bacteria (ALAB) were isolated from Nigerian traditional fermented foods (fufu, burukutu, ogi-bab and kunu-zakki) with the aim of selecting efficient amylase-producing strains. Nine isolates were characterized on the basis of their phenotypic and taxo-molecular characteristics. Three groups could be distinguished by their fermentation profiles and this was confirmed by DNA restriction analysis. Though fermentation profiles gave good identification of strain K9 (unique representative of group III) as Lactobacillus fermentum, they could not be used to ascertain the taxonomic position of strains of groups I and II. Analysis of partial 16S rRNA sequences led to the identification of these groups as L. plantarum strains and confirmed the species of strain K9 as L. fermentum. The two distinct phenotypic groups of L. plantarum differed in their use of D-xylose, L-arabinose, melibiose and were different from the previously described amylolytic L. plantarum A6 isolated from retted cassava in Congo. L. fermentum K9 was different from L. fermentum OgiE1 and Mw2 isolated from Benin maize sourdough and it is the first amylolytic L. fermentum described from Nigerian fermented products. Enzymatic profiles showed some differences between the strains of a similar fermentation group. One of the most relevant characteristics of the isolates was a higher yield of amylase production than those reported previously described ALAB grown under the same conditions. Furthermore, all isolates were tolerant to an exposure at pH 2 and to bile salts.
8. Oguntoyinbo, F. A., Sanni, A. I., Franz, C. M. A. P. And Holzapfel, W. H. (2007).
In-vitro fermentation studies for selection and evaluation of Bacillus strains as
starter cultures for the production of okpehe, a traditional African fermented condiment
Inter. J. Food Microbiol. 113, 208 – 218.
Selected Bacillus and Enterococcusstrains, isolated from traditional okpehe fermentations, were studied for their suitability as starter cultures in laboratory-scale fermentations ofProsopis Africana seeds for the production of okephe, a traditional fermented vegetable product of Nigeria. The strains were selected on the basis of highest proteolytic activity, as determined with the APIZYM (BIOMerieux) test. The choice of starter strains was narrowed to Bacillus subtilis trains BFE 5301 and BFE 5372. These were determined as the best starter combination because of rapid growth, high amylolytic and poteolytic activities, high levels of polyglutamic acid production by strain BFE 5372, as well as bacteriocin production by strain BFE 5372. Other mixed culture fermentations did not yield sensoricallyacceptable products. Although a monoculture fermentation, using only B. subtilis BFE 5372, produced okpehe with very good sensory characteristics, the growth of B. cereus could be detected after 48 h fermentation, indicating that this starter did not sufficiently contribute to product safety. Mixed cuture fermentation with the combination of bacteriocin-producing starter B. subtilis BFE 5301 and the non-bacteriocin-producing B. subtilis BFE 5372, produced a product with good sensory characteristics, in which growth of B. cereus was delayed. The bacteriocin produced by B. subtilis strain BFE 5301 was identified as subtilisin, using subtilisin-specific primers and PCR amplification of he subtilisin gene. The bacteriocin was heat-stable at 100 °C for 10 min and exhibited highest activity at pH values lower or equal to pH 6.0. The bacteriocin was sensitive to the proteolytic enzymes trypsin and α-chymotrypsin at concentrations of 10 mg/ml.
9. Oguntoyinbo, F. A. and Sanni, A. I. (2007). Determination of toxigenic potentials of Bacillus strains isolated from okpehe, a Nigerian fermented condiment. World J. Microbiol. Biotechnol. 23, 65 – 70.
The toxigenic potential of Bacillus species isolated from the traditional fermented condiment okpehe was determined; this aimed at selection of non-toxigenic bacilli as starter cultures to bring about production of safe product. B. subtilis and B. cereus strain isolated from okpehe were evaluated for their possible possession of virulence characteristics. Fifty isolates were screened for their ability to produce diarrhoea enterotoxin by reversed passive latex agglutination (BCET-RPLA) test kit; the results showed that 40% of the B. cereus strains were toxigenic. The ability of selected isolates to compete in situ and in vitro toxin production during the fermentation was also determined. The enterotoxin was not detected using BCET-RPLA kit in the spontaneously fermented samples of okpehe, but the toxin was detected in the okpehe samples fermented using B. cereus enterotoxin producer in mixed starter culture fermentation. The PCR amplification of virulence genes revealed that Bacillus cereus and B. licheniformis, a strain from the B. subtili group, contained DNA sequences encoding the haemolysin BL (hblD) enterotoxin complex. The growth ability of B. cereus strains to high population during the fermentation during the fermentation and the presence of detectable diarroheagenic genes in B. cereus and B licheniformis showed that strains carrying virulence characteristics cannot be totally ruled out in traditionally fermented okpehe.
10. A. Oguntoyinbo, M. Huch, G. Cho. U. Schillinger, W. H. Holzapfel, A. I. Sanni and C. M.
A. P. Franz (2010). Diversity of Bacillus species isolated from Okpehe, a traditional
fermented soup condiment from Nigeria. J. Food Protection 73 (5), 870-878.
The diversity of Bacillus species isolated from the fermented soup condiment okpehe in Nigeria was studied using a combination of phenotypic and genotypic methods. Fifty strains presumptively characterized as Bacillus spp. using the API 50 CHB test were further identified by PCR of randomly amplified polymorphic DNA (RAPD) and by amplified ribosomal DNA restriction analysis (ARDRA) genotyping methods. ARDRA fingerprinting with HhaI, HinfI and Sau3AI restriction enzymes did not allow successful differentiation between the Bacillus species, except for distinguishing B. cereus from other Bacillus species. This problem was overcome with the combination of RAPD PCR and ARDRA genotypic fingerprinting techniques. Sequencing of 16S rRNA genes of selected strains representative of the major clusters revealed that the Bacillus strains associated with this fermentation were B. subtilis, B. amyloliquefaciens, B, cereus and B. licheniformis (in decreasing order of incidence). The presence of enterotoxin genes in all B. cereus strains was demonstrated by multiplex PCR. The high incidence of detection (20%) of possibly pathogenic B. cereus strain that contained enterotoxin genes indicated that these fermented foods may constitute a potential health risk.
Selected Conferences/Workshops Attended
1999. Organized by University of Ghana USAID BEAN/COWPEA
Collaborative Research Support Program and University of Georgia, USA.
5. Guest Lecturer, “Biotechnology and its Potential for the Development of Sustainable Food Systems in Nigeria”. – Paper presented at the “39th Annual Conference of Science Association of Nigeria”. November 25-29, 2001.
6. Facilitator, University of Ibadan Postgraduate School Workshop on “Planning and Writing of Grant-Oriented Research Proposals” July 14-17, 2003, Ibadan, Nigeria.
7. Guest Speaker, “Towards Enhancing Academic Research, Reporting and Publication Skill InThe Academia” Paper presented at the “Babcock University Colloquium, August 11-17, 2003 held at Babcock University, Ogun State, Nigeria.
8. Chairman, 1st Scientific Session, Conference of Nigerian Biotechnology Society, May 20-22nd 2004, Ondo State University, Ado-Ekiti, Nigeria.
9. Invited Participant, National Curriculum Development Workshop on Entrepreneurial Studies, June 22-24, 2004, National University Commission, Abuja, Nigeria.
10.Facilitator, International Advanced E-Learning Workshop on “Management
of Microbiology Hazards in Foods” Bells University of Technology, Ota,
Nigeria and Wageningen Business School, The Netherlands on 11th -15th
January, 2010 at Bells University of Technology Campus.
11. Guest Speaker, “Developing Successful Research Proposals” being a paper
presented at the EU-ACP Science and Technology Project –Developing
Research Capacity among African Environmental Scientists (DRECA), 31st
August – 3rd September, 2010, Ibadan, Nigeria
12. Guest Speaker, “Pains and Gains of Research” being a paper presented at the
Orientation Programme for the New Postgraduate Students, Department of
Physiology, College of Medicine, 21 April, 2011.
13. Guest Speaker, “Flavour and Palatability Properties of Nigerian Traditional
Fermented Condiments” being a paper presented at a Seminar organized by West
African Seasoning Company Limited, Nigeria. Sheraton Hotel, Abuja, June 13th,
2012.
14. Guest Speaker, “Influence of Soil and Water Pollution on Microbial Diversity and
Functions” being a paper presented at the 2012 Wesley University of Science and
Technology Annual National Conference, Ondo, Nigeria, July 30 – August 3, 2012.
15. Guest Speaker, “Mitigating the Harmful Effects of Waste Materials on the
Environment and People: Prospects of Exploring the Diverse Microbiome of the Soil”
being a paper presented at the 2013 Wesley University of Science and
Technology Annual National Conference, Ondo, Nigeria, August 20 – August 24,
2013.
Names and Addresses of 3 referees
Prof. B.A. Oso ( Ph.D Supervisor, now retired)
Adjunct Professor, Department of Microbiology
Afe Babalola University, Ado-Ekiti, Nigeria.
Mobile: 234-2-8023739043
Prof. Goran Molin
Department of Food Technology, Chemical Center
University of Lund, P.O. Box 124, SE -221 00
Lund, Sweden,
E-mail; goran.molin@livsteki.lth.se
Prof. A. O. Togun
Department of Crop Protection & Environmental Biology
University of Ibadan, Nigeria.
E-mail: aotogun@yahoo.com
Mobile: 234-8033251492
Professor of Food Microbiology & Biotechnology
Department of Microbiology
University of Ibadan, Nigeria.
Fax: 234-2-8103043
E-mail: abiodun.sanni@ui.edu.ng
Phone: 234-8023341920