ICFC 2017 - International Conference on Food Contaminants (Book of Abstracts)GA/EFSA/AFSCO/2016/01-02, from EFSAinfo:eu-repo/semantics/publishedVersio

Gonçalves, Ana

Venâncio, Armando

Universidade do Minho: RepositoriUM

    page 43 Session 1 Poster Abstracts Climate change and implications for food safety   Study on the possibility of aflatoxin M1 milk contamination from ingestion of contaminated  feed by dairy cattle POSTER 1.01 Ana Gonçalves 1; Armando Venâncio 1 ABSTRACT Aflatoxin contamination is a major issue in food and feed safety fields. In fact, the presence of aflatoxin B1 (AFB1) has a wider impact since its presence in feed can lead to contaminated milk, because the toxin is metabolised in aflatoxin M1 (AFM1) by dairy cattle which feed contains the mycotoxin. In the EU, the maximum legal level for AFM1 in milk is 0.05 µg/kg, while for AFB1 it is 5 and 20 µg/kg, for compound feed for dairy cattle and feed raw materials, respectively. Based on relevant data, calculations on the expected level of AFM1 in milk were made, as well as on the AFB1 content in feeds that assures compliance of milk with current legislation. A feed consumption of 18.5 to 26 kg and toxin carry-overs of 1, 2 and 6.2 % were considered. Regarding the predicted AFM1 levels in milk, the highest value was 0.28 µg/kg, for the worst tested case - highest carry-over and all feed at the highest allowed level for AFB1. This value is over 5 times higher than the EU limit for AFM1 in milk. Considering the assessment of the necessary level of AFB1 in feed to ensure a compliant milk, findings suggested that the mean concentration in dairy cattle feeds should be, in some scenarios, lower than the regulated limits (range: 1.55 to 6.76 µg/kg). The results show the possibility of compliant feed originating milk contaminations above the legal limit. Even so, because it is not expected that dairy cattle’s entire consumption of feed has the maximum concentration level of AFB1, AFM1 levels in milk would be lower than the obtained. In fact, it is known that the incidence of milk samples with AFM1 above 0.05 µg/kg is around 0.06 % (EFSA, 2004). The relevance of this subject is even higher since according to an EFSA report (2012) the expected climate changes - higher temperatures and drought - will lead to an increase on mycotoxin production and have a negative impact on this matter.  Ackowledgments: Ana Gonçalves received support through grant agreement number GA/EFSA/AFSCO/2016/01-02, from EFSA.  1 - CEB - Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal    

Study on the possibility of aflatoxin M1 milk contamination from ingestion of contaminated feed by dairy cattle

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Universidade do Minho: RepositoriUM