Aflatoxin contamination of crops is frequent in warm regions across the globe, including large areas in sub-Saharan Africa. Crop contamination with these dangerous toxins transcends health, food security, and trade sectors. It cuts across the value chain, affecting farmers, traders, markets, and ...
Bandyopadhyay, Ranajit
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Ortega-Beltran, A.
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Akande, A.
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Mutegi, C.
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Atehnkeng, J.
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Kaptoge, L.
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Senghor, A.L.
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Adhikari, B.N.
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Cotty, P.J.
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[Biological control of aflatoxins in Africa: current status and potential challenges in the face of climate change]
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Biological control of aflatoxins in Africa: current status and potential challenges in the face of climate change
Aflatoxin contamination of major food crops is a serious problem in Senegal. Maize and sesame samples were collected during a survey in five districts located in two agro-ecological zones in Senegal to determine levels of aflatoxin contamination and the distribution and toxigenicity potential of ...
Diedhiou, P.M.
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Bandyopadhyay, Ranajit
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Atehnkeng, J.
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Ojiambo, P.S.
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[Aspergillus colonization and aflatoxin contamination of maize and sesame kernels in two agro-ecological zones in Senegal]
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Aspergillus colonization and aflatoxin contamination of maize and sesame kernels in two agro-ecological zones in Senegal
Aflatoxin contamination in maize and groundnut is perennial in Ghana with substantial health and economic burden on the population. The present study examined for the first time the prevalence of aflatoxin contamination in maize and groundnut in major producing regions across three agroecological...
Agbetiameh, D.
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Ortega-Beltran, A.
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Awuah, R.T.
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Atehnkeng, J.
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Cotty, P.J.
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Bandyopadhyay, Ranajit
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[Prevalence of aflatoxin contamination in maize and groundnut in Ghana: population structure, distribution, and toxigenicity of the causal agents]
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Prevalence of aflatoxin contamination in maize and groundnut in Ghana: population structure, distribution, and toxigenicity of the causal agents
Aspergillus flavus has long been considered to be an asexual species. Although a sexual stage was recently reported for this species from in vitro studies, the amount of recombination ongoing in natural populations and the genetic distance across which meiosis occurs is largely unknown. In the cu...
Islam, M.S.
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Callicott, K.A.
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Mutegi, C.
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Bandyopadhyay, Ranajit
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Cotty, P.J.
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[Aspergillus flavus resident in Kenya: high genetic diversity in an ancient population primarily shaped by clonal reproduction and mutation-driven evolution]
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Aspergillus flavus resident in Kenya: high genetic diversity in an ancient population primarily shaped by clonal reproduction and mutation-driven evolution
ompetitive exclusion of aflatoxin producers by endemic atoxigenic strains of Aspergillus flavus is a proventool for aflatoxin management being adapted for use in Africa. Field efficacy of an experimental formulationconsisting of four native atoxigenic strains (La3303, La3304, La3279 and Ka16127) ...
Atehnkeng, J.
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Ojiambo, P.
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Cotty, P.
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Bandyopadhyay, Ranajit
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[Field efficacy of a mixture of atoxigenic Aspergillus flavus Link: Fr vegetative compatibility groups in preventing aflatoxin contamination in maize (Zea mays L.)]
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Field efficacy of a mixture of atoxigenic Aspergillus flavus Link: Fr vegetative compatibility groups in preventing aflatoxin contamination in maize (Zea mays L.)
Crops frequently contaminated by aflatoxins are important sources of revenue and daily nourishment in manyportions of sub-Saharan Africa. In recent years, reports have associated aflatoxinswith diminished human healthand export opportunities in many African Nations. Aflatoxins are highly carcinog...
Probst, C.
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Bandyopadhyay, Ranajit
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Cotty, P.
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[Diversity of aflatoxinproducing fungi and their impact on food safety in subSaharan Africa]
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Diversity of aflatoxinproducing fungi and their impact on food safety in subSaharan Africa
Maize infected by aflatoxin-producing Aspergillus flavus may become contaminated with aflatoxins, and as a result, threaten human health, food security and farmers’ income in developing countries where maize is a staple. Environmental distribution and genetic diversity of A. flavus can influence ...
Atehnkeng, J.
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Donner, M.
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Ojiambo, P.S.
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Ikotun, B.
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Augusto, J.
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Cotty, P.
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Bandyopadhyay, Ranajit
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[Environmental distribution and genetic diversity of vegetative compatibility groups determine biocontrol strategies to mitigate aflatoxin contamination of maize by Aspergillus flavus]
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Environmental distribution and genetic diversity of vegetative compatibility groups determine biocontrol strategies to mitigate aflatoxin contamination of maize by Aspergillus flavus
Aspergillus flavus is the most common causal agent of aflatoxin contamination of food and feed. However, aflatoxin-producing potential varies widely among A. flavus genotypes with many producing no aflatoxins. Some non-aflatoxigenic genotypes are used as biocontrol agents to prevent contamination...
Adhikari, B.N.
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Bandyopadhyay, Ranajit
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Cotty, P.J.
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[Degeneration of aflatoxin gene clusters in Aspergillus flavus from Africa and North America]
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Degeneration of aflatoxin gene clusters in Aspergillus flavus from Africa and North America
Aspergillus flavus has two morphotypes, the S strain and the L strain, that differ in aflatoxin-producing ability and other characteristics. Fungal communities on maize dominated by the S strain of A. flavus have repeatedly been associated with acute aflatoxin poisonings in Kenya, where managemen...
Probst, C.
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Bandyopadhyay, Ranajit
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Price, L.E.
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Cotty, P.
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[Identification of atoxigenic Aspergillus flavus isolates to reduce aflatoxin contamination of maize in Kenya]
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Identification of atoxigenic Aspergillus flavus isolates to reduce aflatoxin contamination of maize in Kenya