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dc.contributor.authorSserumaga, J.P.
dc.contributor.authorOrtega-Beltran, A.
dc.contributor.authorWagacha, J.M.
dc.contributor.authorMutegi, C.K.
dc.contributor.authorBandyopadhyay, R.
dc.date.accessioned2020-06-26T15:01:32Z
dc.date.available2020-06-26T15:01:32Z
dc.date.issued2020-01
dc.identifier.citationSserumaga, J.P., Ortega-Beltran, A., Wagacha, J.M., Mutegi, C.K. & Bandyopadhyay, R. (2020). Aflatoxin-producing fungi associated with pre-harvest maize contamination in Uganda. International Journal of Food Microbiology, 313, 1-36.
dc.identifier.issn0168-1605
dc.identifier.urihttps://hdl.handle.net/20.500.12478/6880
dc.description.abstractMaize is an important staple crop for the majority of the population in Uganda. However, in tropical and subtropical climates, maize is frequently contaminated with aflatoxins, a group of cancer-causing and immuno-suppressive mycotoxins produced by Aspergillus section Flavi fungi. In Uganda, there is limited knowledge about the causal agents of aflatoxin contamination. The current study determined both the aflatoxin levels in pre-harvest maize across Uganda and the structures of communities of aflatoxin-producing fungi associated with the maize. A total of 256 pre-harvest maize samples were collected from 23 major maize-growing districts in eight agro-ecological zones (AEZ). Maize aflatoxin content ranged from 0 to 3760 ng/g although only around 5% for Ugandan thresholds. For EU it is about 16% of the samples contained aflatoxin concentrations above tolerance thresholds. A total of 3105 Aspergillus section Flavi isolates were recovered and these were dominated by the A. flavus L morphotype (89.4%). Densities of aflatoxin-producing fungi were negatively correlated with elevation. Farming systems and climatic conditions of the AEZ are thought to have influenced communities' structure composition. Fungi from different AEZ varied significantly in aflatoxin-producing abilities and several atoxigenic genotypes were identified. The extremely high aflatoxin concentrations detected in some of the studied regions indicate that management strategies should be urgently designed for use at the pre-harvest stage. Atoxigenic genotypes detected across Uganda could serve as aflatoxin biocontrol agents to reduce crop contamination from fields conditions and throughout the maize value chain.
dc.description.sponsorshipBill & Melinda Gates Foundation
dc.description.sponsorshipUnited States Agency for International Development
dc.format.extent1-36
dc.language.isoen
dc.subjectAspergillus Flavus
dc.subjectAflatoxins
dc.subjectAgroecology
dc.subjectMaize
dc.subjectUganda
dc.titleAflatoxin-producing fungi associated with pre-harvest maize contamination in Uganda
dc.typeJournal Article
cg.contributor.crpAgriculture for Nutrition and Health
cg.contributor.crpMaize
cg.contributor.affiliationNational Agricultural Research Organisation, Uganda
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationUniversity of Nairobi
cg.coverage.regionAfrica
cg.coverage.regionEast Africa
cg.coverage.regionWest Africa
cg.coverage.countryUganda
cg.coverage.hubEastern Africa Hub
cg.coverage.hubHeadquarters and Western Africa Hub
cg.researchthemePlant Production and Health
cg.identifier.bibtexciteidSSERUMAGA:2020
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAflatoxin
cg.iitasubjectAgronomy
cg.iitasubjectFood Security
cg.iitasubjectMaize
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Diseases
cg.iitasubjectPlant Health
cg.iitasubjectPlant Production
cg.iitasubjectValue Chains
cg.journalInternational Journal of Food Microbiology
cg.notesPublished online: 31 Oct 2019
cg.accessibilitystatusOpen Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCreative Commons Attribution 4.0 (CC BY 0.0)
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.1016/j.ijfoodmicro.2019.108376
cg.iitaauthor.identifierAlejandro Ortega-Beltran: 0000-0003-3747-8094
cg.iitaauthor.identifierCharity Mutegi: 0000-0002-3188-0480
cg.iitaauthor.identifierRanajit Bandyopadhyay: 0000-0003-2422-4298


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