TITLE:
Geographic Distribution of Aspergillus Section Flavi Subspecies Isolated from Crops, Foods, and Feedstuffs in Benin
AUTHORS:
Adjovi Yann Christie Sissinto, Fossou Joli Prince Mintognissè, Ahehehinnou Hilarion Ulrich Mawuton
KEYWORDS:
Agroecological Area, Foods, Aflatoxins, TLC, PCR
JOURNAL NAME:
Advances in Microbiology,
Vol.13 No.8,
August
7,
2023
ABSTRACT: Mycotoxins are one of the most dangerous chemical contaminants found in staple foods. Aflatoxins, a well-known mycotoxin, are mostly dangerous for both humans and livestock, according to the International Agency Cancer for Research on Cancer. In this paper, the author aimed to establish a geographical distribution map of aflatoxins fungi producers on several food like maize, maize of popcorn, popcorm, fish, spices, cassava, mil, sorghum, peanut and voandzou from the eight (8) agroecological area in Benin. Several molds were isolated from these foods and morphologically characterized on malt extract agar. Among the fungi, 318 species isolated from four leading subspecies, A. flavus, A. parasiticus, A. nomius, and A. togoensis, belonging to the Aspergillus section Flavi, were identified. For molecular analysis, polymerase chain reaction (PCR) methods were used to amplify 1450 pb of the beta-tubulin gene, and their products were used to realize restruction fragment length polymorphisms (RFLPs) to identify genic characteristics. From this strain, three DNA fragments were identified as belonging to subspecies A. flavus, and four DNA fragments were classified as belonging to A. parasiticus. Furthermore, chemotaxonomic’s analysis was performed on all strains isolated by thin layer chromatography revealing variable levels of aflatoxin’s contamination in the samples. All feedstuffs from the eight agroecological areas in Benin were found to be contaminated by several molds, and their mycotoxins mainly comprised four types of aflatoxins: B1, B2, G1 and G2. This study revealed that the four agroecological areas in northern Benin are primarily contaminated by A. flavus and A. togoensis, producers of aflatoxins B1 and B2, whereas the four agroecological areas southern Benin are contaminated by A. parasiticus and A. nomius, producers of both sets of aflatoxins B1 and B2 and aflatoxins G1 and G2. This study can be used to protect public health from the risks associated with liver cancer.