Aflatoxin B1 and B2 producing Aspergillus flavus was isolated from rumen liquor.
Rumen liquor from which the isolate was obtained, contained aflatoxin B1 and B2.
Microbial inhabitants of rumen also can be a source of aflatoxin in rumen.
Aflatoxin B1 may be converted to aflatoxin M1 and excreted into cow milk.
This is the first report anaerobic production of aflatoxin B1 and B2.