The most widespread human exposure to aflatoxins from animal sources  has occurred when aflatoxin-contaminated feed was given to domestic animals.  Among agricultural animals, poultry are generally more sensitive to aflatoxins than ruminants. In poultry, aflatoxin toxicity includes impairment of the uptake of essential nutrients. In ruminants, aflatoxin exposure can cause immunosuppression and impaired growth of young animals. 1  Humans can be exposed to aflatoxins by consuming contaminated animal products, including milk15 or eggs16  containing M1 and M2, the partially detoxified, hydroxylated metabolites of the potent carcinogens,  Aflatoxins B1 and B2. .