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U.S. Department of Health and Human Services

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Food Control 2013 Jan;29(1):1-6

Aflatoxin M-1 in milk and distribution and stability of aflatoxin M-1 during production and storage of yoghurt and cheese

Iha MH, Barbosa CB, Okada IA, Trucksess MW


The objective of this study was to investigate the incidence and occurrence of aflatoxin M-1 (AFM(1)) in Brazilian milk and infant formula. The distribution and stability of AFM(1) in cheese and yoghurt were also determined. Milk samples and infant formula samples were purchased in Ribeirao Preto-SP, Brazil and were analyzed for AFM(1) using immunoaffinity column purification, liquid chromatography separation and fluorescence detection. AFM(1) was detected in 83% of the milk samples (>3 ng/kg) with levels ranging from 8 to 437 ng/kg for fluid milk, and 20-760 ng/kg for powdered milk. No AFM(1) was found in infant formula. Processing and storage was shown to have little effect on AFM(1) content in milk and milk products. Total AFM(1) mass in milk was reduced by 3.2% in cheese and by 6% in yoghurt (pH 4.4). The mean concentration of AFM(1) in curds was 1.9-fold higher and whey was 0.6-fold lower than in unprocessed milk.

Category: Journal Article
DOI: 10.1016/j.foodcont.2012.05.058
Includes FDA Authors from Scientific Area(s): Food
Entry Created: 2012-11-23