Excretion of Aflatoxin M1 in milk of goats fed diet contaminated by Aflatoxin B1

An experiment was carried out to study the excretion of aflatoxin M1(AFM1) in milk of three goats fed a single dose (0.8mg/head) of pure aflatoxin B1 (AFB1). The values of AFM1 concentration excreted in milk was highly variable among goats, even if the pattern of excretion over time was very similar among the three animals. AFM1 was first detected at the milking performed 1h after the AFB1 administration. The highest values of AFM1 concentration in milk were reached 3 and 6h after the AFB1 intake. The trend of clearance of AFM1 in milk over time was expressed by a decreasing exponential equation. AFM1 concentration was below the EU maximum allowed level (50 ng/L) in milk collected 36 h after the AFB1 administration.