Isolation of aflatoxigenic Aspergillus spp. from food products -- Sao Paulo, Capital

There were analysed 264 samples of food products, that included: natural flavours, honeys, powdered foods, starch products and others. From these samples, 269 strains of Aspergillus genera were isolated. The growth of 215 strains, on yeast extract broths supplemented with 20% of sucrose (YES), was tested by thin layer chromatography in silica gel for aflatoxin. The tests were positive in six samples (2,79%)k respectively: in two samples of honey, two of starch products, one of natural flavour and one of powder product for milk beverage. The aflatoxigenic strains were three (2,91%) of Aspergillus sp: two (2,66%) of flavus group and one (4,35%) of Aspergillus flavus , Link.