Examination of Aflatoxin M<sub>1</sub> Contamination in Milk and Milk Drinks Available in Fukuyama City

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  • 福山市内で市販される乳および乳飲料のアフラトキシンM<sub>1</sub>汚染調査
  • 福山市内で市販される乳および乳飲料のアフラトキシンM₁汚染調査
  • フクヤマ シナイ デ シハン サレル ニュウ オヨビ ニュウインリョウ ノ アフラトキシン M ₁ オセン チョウサ

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Abstract

<p>To determine the relationship between seasons and regions and aflatoxin M1 (AFM1) contamination of milk distributed in Fukuyama City, we conducted a survey once during the summer and once during the winter between June 2018 and January 2019. We compared the AFM1 contamination levels in milk drinks available in Fukuyama City during the same period, to provide more about the factors causing AFM1 contamination. All milk samples examined exhibited AFM1 contamination levels below the standard AFM1 contamination level (0.5 μg/kg). For the comparison based on seasons, one milk sample collected in the summer (0.07 μg/kg) exceeded the EU limit (heat-treated milk: 0.050 μg/kg). However, there was no significant difference in the AFM1 contamination level (p>0.05). For the comparison based on regions, the AFM1 contamination level in the milk sample from the Chugoku Region was significantly higher in the winter and significantly lower in the summer compared to those from other regions. AFM1 contamination of milk did not have a direct relationship with seasons or regions, but was instead influenced by the type, amount, and management of feed supplied to dairy cattle. For the comparison between milk and milk drinks, the AFM1 contamination levels in milk drinks were significantly lower (p<0.01). The highest AFM1 concentration (0.08 μg/kg) was detected in one sample of milk drink sampled during the summer. The AFM1 contamination of milk drinks is likely affected by the level of contamination in raw materials, the proportion of such raw materials in the drinks, and the process type. An increase in non-fat milk solids was assumed to be a factor that increases AFM1 contamination.</p>

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