title: Aflatoxin-producing potential of Aspergillus flavus strains isolated from Spanish poultry feeds.
abstract: A total of 126 fungal strains belonging to the Aspergillus flavus group isolated from commercial poultry mixed feeds were studied. One hundred and twenty-five were identified as A. flavus and one as A. parasiticus. Forty nine strains (39%) produced aflatoxins on a crushed moist wheat medium (28 degrees C/10 days), whereas only sixteen (13%) showed specific fluorescence on Aflatoxin-Producing Ability Medium. In both media, mainly aflatoxins B1 and B2 were detected, the average concentration of aflatoxins being 4 294 +/- 1 083 micrograms/kg in crushed moist wheat medium, and 877 +/- 257 micrograms/kg in Aflatoxin-Producing Ability Medium.
mesh_terms: D016604:Aflatoxin B1; D000348:Aflatoxins / Q000096:biosynthesis*; D000821:Animal Feed; D000818:Animals; D001230:Aspergillus / Q000302:isolation & purification / Q000378:metabolism; D001231:Aspergillus flavus / Q000254:growth & development / Q000302:isolation & purification / Q000378:metabolism*; D003470:Culture Media; D005516:Food Microbiology; D011200:Poultry; D013030:Spain
chemical_list: D000348:Aflatoxins; D003470:Culture Media; C027955:aflatoxin G1; C029754:aflatoxin G2; C029753:aflatoxin B2; D016604:Aflatoxin B1