Seasonal Survey In Content M1 Aflatoxin In Raw Milk Taken From 15 Dairy Factory
2008
Tajkarimi, M. | Ghaemmaghami S.S. | Motalebi, A. | Poursoltani, H. | Salahnejad, A. | Shojaee, F.
Aflatoxins, are secondary metabolites fungal products with carcinogenic and teratogenic effect especially with the effect on p 53 suppressor gene. From these groups of toxins, Aflatoxin B1 is produced from some species of Aspergillus (Aspergillus flavous and A. parasiticus) can contaminate animal feed, hydrolyzed and changed to the aflatoxin M1 and transmit to the milk consumers. In one year seasonal survey, 319 randomly selected raw milk samples which obtained from dairy farms and milk collecting centers from 15 dairy plants were analyzed with validated immunoaffinity HPLC method. 54% of samples are contaminated with mean 0.0564 ug/Kg and median 0.0170 ug/Kg with SD=0.1368 and Variance = 0.0187, more than 44% of samples are below 0.01 ug/Kg and 77% of samples are below 0.05 ug/Kg. Based on the statistical analysis, the level of the contamination in dairy farms and milk collecting centers were similar. The level of contamination could be directly influenced on the season and the factory place parameters. The kind of the dairy farm and milk collecting centers are indirectly contributed on the level of contamination with bilateral effect with seasonal variation.
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