Aflatoxin production by a variant of Aspergillus oryzae (NRRL strain 1988) on cowpeas (Vigna sinensis).

Aflatoxin B1, B2, G1, and G2 are produced when a variant of Aspergillus oryzae (NRRL strain 1988) is grown on cowpeas or rice. The present study indicates that a strain of Aspergillus oryzae approved for use in food processing is variable and the resulting variant, unlike the parent strain, has a propensity to produce aflatoxin.