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Distribution and toxigenicity of Aspergillus species isolated from maize kernels from three agroecological zones in Nigeria

dc.contributor.authorAtehnkeng, J.
dc.contributor.authorOjiambo, P.
dc.contributor.authorDonner, M.
dc.contributor.authorIkotun, T.
dc.contributor.authorSikora, R.A.
dc.contributor.authorCotty, P.
dc.contributor.authorBandyopadhyay, Ranajit
dc.date.accessioned2019-12-04T11:14:37Z
dc.date.available2019-12-04T11:14:37Z
dc.date.issued2008
dc.identifier.citationAtehnkeng, J., Ojiambo, P., Donner, M., Ikotun, T., Sikora, R., Cotty, P. & Bandyopadhyay, R. (2008). Distribution and toxigenicity of Aspergillus species isolated from maize kernels from three agro-ecological zones in Nigeria. International Journal of Food Microbiology, 122(1), 74-84.
dc.identifier.issn0168-1605
dc.identifier.urihttps://hdl.handle.net/20.500.12478/2812
dc.description.abstractMaize samples were collected during a survey in three agro-ecological zones in Nigeria to determine the distribution and aflatoxin-producing potential of members of Aspergillus section Flavi. The three agro-ecological zones were, Derived Savannah (DS) and Southern Guinea Savannah (SGS) in the humid south and North Guinea Savannah (NGS) in the drier north. Across agro-ecological zones, Aspergillus was the most predominant fungal genera identified followed by Fusarium with mean incidences of 70 and 24%, respectively. Among Aspergillus, A. flavus was the most predominant and L-strains constituted > 90% of the species identified, while the frequency of the unnamed taxon SBG was < 3%. The incidence of atoxigenic strains of A. flavus was higher in all the districts surveyed except in the Ogbomosho and Mokwa districts in DS and SGS zones, respectively, where frequency of toxigenic strains were significantly (P < 0.05) higher than that of atoxigenic strains. The highest and lowest incidence of aflatoxin positive samples was recorded in the SGS (72%) and NGS (20%), respectively. Aflatoxin contamination in grain also followed a similar trend and the highest mean levels of B-aflatoxins were detected in maize samples obtained from Bida (612 ng g− 1) and Mokwa (169 ng g− 1) districts, respectively, in the SGS. Similarly, the highest concentrations of G-aflatoxins were detected in samples from Akwanga district in the SGS with a mean of 193 and 60 ng g− 1, respectively. When agro-ecological zones were compared, B-aflatoxins were significantly (P < 0.05) higher in SGS than in NGS, and intermediate in maize samples from the DS agro-ecological zone.
dc.description.sponsorshipFederal Ministry for Economic Cooperation and Development, Germany
dc.language.isoen
dc.subjectAflatoxins
dc.subjectAspergillus Section Flavi
dc.subjectGeographical Distribution
dc.titleDistribution and toxigenicity of Aspergillus species isolated from maize kernels from three agroecological zones in Nigeria
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationUniversity of Ibadan
cg.contributor.affiliationUniversity of Bonn
cg.contributor.affiliationUniversity of Arizona
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryNigeria
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAflatoxin
cg.iitasubjectMaize
cg.iitasubjectPests Of Plants
cg.iitasubjectPlant Diseases
cg.iitasubjectDisease Control
cg.accessibilitystatusLimited Access
local.dspaceid93913


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