in this investigation aflatoxin contamination of eighty different iranian white cheeses were determined by t.l.c. method. the result of this study showed that, 97.5% of the samples contained aflatoxin m1 & m2 which are transferred from milk. as far as direct contamination, 30% of the samples contained aflatoxin b1, g1, g2, from which 2.5% contained aflatoxin b1, 5% contained aflatoxin b2, 20% c...