Combined genotyping strategy reveals structural differences between Aspergillus flavus lineages from different habitats impacting human health

In this study, 59 A. flavus isolates from four different habitats and 1 A. minisclerotigenes isolate were investigated. The isolates were identified and confirmed at the species level by the sequence analysis of a part of their calmodulin gene. Applying a combined analysis of UP‐PCR, microsatellite, and calmodulin sequence data, the four group of isolates formed separate clusters on the phylogenetic tree. Examining the distribution of mating type genes MAT1‐1 and MAT1‐2, a ratio of approximately 3:1 was determined, and no correlation was found between the carried mating type gene and the aflatoxin production capability. HPLC analysis revealed that none of the examined isolates collected from indoor air or maize in Central Europe were able to produce aflatoxins, while about half of the isolates from India produced these mycotoxins under the test conditions.

Source: Journal of Basic Microbiology - September 13, 2017 Category: Microbiology Authors: Nikolett Baranyi, S ándor Kocsubé, Daniela Jakšić Despot, Maja Šegvić Klarić, András Szekeres, Ottó Bencsik, Anita Kecskeméti, Palanisamy Manikandan, Beáta Tóth, László Kredics, Jamal M. Khaled, Naiyf S. Alharbi, Csaba Vágvölgyi, János Va Tags: RESEARCH PAPER Source Type: research