Forty-four fungal species belonging to 20 genera were isolated from 30 samples of qat leaves. The most frequent genera were Aspergillus, Alternaria, Penicillium, and Cladosporium followed by Fusarium, Drechslera, Chaetomium, and Mucor. The most prevalent species in above genera were Aspergillus niger, A. flavus, A fumigatus, Alternaria alternata, Penicillium chrysogenum, P. citrinum, Cladosporium cladosporioides, and Fusarium verticillioides. From these fungi, 17 species (39%) related to 7 genera (35%) proved to be true endophytes. Eleven out of 75 isolates were mycotoxigenic. A. alternata produced alternariol and alternariol monomethyl ether whereas A. flavus produced aflatoxins B1 and B2. Ochratoxin A, sterigmatocystin, citrinin and T-2 toxin were produced by A. ochraceus, A. versicolor, P. citrinum and F. oxysporum, respectively. The presence of such toxigenic fungi associated with qat leaves is considered to be a threat to public health.

Botany Department Faculty of Science University of Assiut Assiut 71516 Egypt

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J Assoc Off Anal Chem. 1979 May;62(3):579-85 PubMed

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J Ethnopharmacol. 1984 Nov;12(2):115-78 PubMed

Appl Microbiol. 1973 Nov;26(5):757-61 PubMed

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Poult Sci. 1981 Jun;60(6):1165-74 PubMed

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