Seasonal study of aflatoxin M1 contamination in milk in five regions in Iran

Between April 2003 and February 2004, 98 samples of raw milk were obtained from milk tanks in one dairy plant in each of five regions in Iran. These were chosen with mean distances apart of 400 km, whereby they have different ecologies (temperature, relative humidity, etc.) and different agricultura...

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Bibliographic Details
Published in:International journal of food microbiology 2007-05, Vol.116 (3), p.346-349
Main Authors: Tajkarimi, M, Aliabadi, F.S, Nejad, M.S, Pursoltani, H, Motallebi, A.A, Mahdavi, H
Format: Article
Language:English
Subjects:
aflatoxin M1
Aflatoxin M1 - analysis
Animals
Biological and medical sciences
Cattle
Chromatography, High Pressure Liquid - methods
Codex Alimentarius
Consumer Product Safety
dairies
Dairying - standards
ecologists
food contamination
Food Contamination - analysis
Food industries
food intoxication
Food microbiology
food pathogens
Fundamental and applied biological sciences. Psychology
Humans
Iran
Milk - chemistry
Milk and cheese industries. Ice creams
milk tanks
raw milk
seasonal variation
Seasons
Sensitivity and Specificity
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Summary:Between April 2003 and February 2004, 98 samples of raw milk were obtained from milk tanks in one dairy plant in each of five regions in Iran. These were chosen with mean distances apart of 400 km, whereby they have different ecologies (temperature, relative humidity, etc.) and different agricultural products were used for animal feeding. Samples (24-25 per season) were laboratory heat treated and were analyzed for aflatoxin M1 with a validated High Performance Liquid Chromatography (HPLC) system. The overall mean of all samples was 0.041-0.065 μg/L (95% confidence) and the adjusted mean based on statistical modification was 0.039 ppb: 61 samples had 0.000-0.050 μg/L, 29 samples were contaminated with 0.05-0.10 μg/L, and the remaining 8 samples had 0.1-0.39 μg/L. All of the samples were lower than Codex Alimentarius and FDA standards (0.5 μg/L). Levels of aflatoxin M1 were higher in winter and spring than in summer and autumn, but the differences were not statistically significant (P > 0.07). However, the level of aflatoxin in milk from one region (Hamedan) was significantly lower (P < 0.05) than in those of the other regions (Gorgan, Rasht, Shiraz, Tehran).
ISSN:0168-1605
1879-3460
DOI:10.1016/j.ijfoodmicro.2007.02.008