期刊
FOOD CONTROL
卷 128, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodcont.2021.108150
关键词
Morphotype; Atoxigenic strains; Aspergillus flavus; Aspergillus parasiticus
资金
- United States Agency for International Development (USAID) through the Research Project entitled Aflatoxin Policy and Program for the East Africa Region
The study assessed contamination of groundnut with Aspergillus section Flavi fungi and aflatoxin under storage conditions in Uganda. Different cropping systems, storage, and climatic conditions influenced the composition of fungal communities and aflatoxin levels. Urgent management strategies are required for districts with extremely high aflatoxin levels in groundnut samples.
Groundnut (Arachis hypogaea L.) is essential to prepare numerous popular dishes across sub-Saharan Africa. However, groundnuts may contain hazardous aflatoxin levels. There is scant information on aflatoxin levels in Uganda and the causal agents of contamination in stored groundnut. High aflatoxin content hinders trading of groundnut and groundnut products in international markets, affecting Uganda's economy. The current study assessed contamination of groundnut with Aspergillus section Flavi fungi and aflatoxin under storage conditions. One hundred seventy-nine samples were sourced from farmers' household stores from 18 major groundnutproducing districts in seven agro-ecological zones (AEZ). Aflatoxin levels ranged from 0 to 1327 ng/g. Around 45% of the samples had aflatoxin levels above the Uganda National Bureau of Standards (10 ng/g). In addition, 1829 Aspergillus section Flavi isolates were recovered, and the A. flavus L morphotype dominated the communities (80%). Cropping systems, storage and climatic conditions in different AEZ influenced communities' structure composition and aflatoxin levels. There were significant (P < 0.05) differences in aflatoxin content and frequencies of Aspergillus species among AEZ and districts. The extremely high aflatoxin levels detected in samples from some districts beckoned the urgent need for management strategies are. Aflatoxin biocontrol products containing atoxigenic isolates of A. flavus, such as those detected in the study, could be used to reduce aflatoxin contamination in both field and storage conditions.
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