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Online Journal of Veterinary Research©
Volume 24(8): 458-463, 2020. .
Aflatoxin B1 and M1 in animal feeds and milk.
Razzagh Mahmoudi*1 and Reza Norian2
1Department of Food Hygiene and Aquatics, Faculty of Veterinary Medicine, University of Tabriz, Tabriz, 2Laboratory of Food Quality Control and Hygiene, Veterinary Medicine Office, Qazvin province, Iran
Mahmoudi R, Norian R., Aflatoxin B1 and M1 in animal feeds and milk, Onl J Vet Res., 24(8): 458-463, 2020. In dairy cattle, aflatoxin M1 (AFM1) may occur in milk and dairy products from ingestion of feed contaminated with aflatoxin B1 (AFB1). We collected 288 milk samples for AFM1 and AFB1 in feed determined by ELISA. We detected AFM1 in 163 milk samples (56.59%) ranging between 0.013 and 0.226 ppb of which 113 (56.59%) were higher than maximum tolerable limit of 0.05 of The European union/Codex Alimentarius Commission. In Summer milk, mean AFM1 was 0.080 and Winter 0.183 ppb. In Winter feed AFB1 was ~2.27ppb and Summer ~0.8ppb (P<0.05). Of 216 feed samples of corn silage, alfalfa hay and concentrate we found 178 (82.40%) with ~1.55 ± 0.89ppb AFB1 (mostly in corn silage) with 36.51% (65/178) exceeding WHO/FAO limits (0.5ppb) for dairy feed with lower levels in summer samples which may account for lower AFM1 levels in milk collected during summer. Our findings suggest that AFB1 in feed may affect AFM1 levels in milk. Management of AFB1 levels in imported corn may protect against AFM1-induced health risks.
Key Words: Aflatoxins, milk, feed, dairy cattle.