Occurrence and seasonal variation of aflatoxin in dairy cow feed with estimation of aflatoxin M1 in milk from Iran
2016
Bahrami, Rozhin | Shahbazi, Yasser | Nikousefat, Zahra
The aims of the present study were to investigate the occurrence of aflatoxin B ₁ (AFB ₁), aflatoxin B ₂ (AFB ₂), aflatoxin G ₁ (AFG ₁) and aflatoxin G ₂ (AFG ₂) in dairy cow feedstuff samples collected from four west provinces in Iran and estimate the corresponding concentrations of aflatoxin M ₁ (AFM ₁) in milk during winter and summer in 2014. A total of 160 feed samples consisting of corn silage (n = 40), alfalfa hay (n = 40), straw (n = 40) and barley (n = 40) were analyzed using high-performance liquid chromatography with a fluorescence detector method. AFB ₁, AFB ₂, AFG ₁ and AFG ₂ were detected in 82.5%, 69.37%, 43.12% and 41.87% of the feed samples, respectively. The concentration of AFB ₁ in 65% (26/40) and 10% (4/40) of corn silage and straw samples was higher than the European Union limit, respectively. Estimation of the total corresponding concentration of AFM ₁ in milk was evaluated as 20.16 and 35.68 ng/l during summer and winter, respectively.
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