Etat actuel de la pollution du lait et des produits laitiers par les résidus de composés organo-chlorés

Abstract - Chlorinated pesticides are the major contaminants, in milk, butter, and cheese. In the mean time, other chlorinated polluants have been detected, i.e. polychlorobiphenyls, and also some newer anthelmintics used in veterinary therapeutic.
Last two years, in France, a clean improvement appeared for B.H.C. residues. On the other hand heptachlor-epoxyde and dieldrin residues always have the same level of contamination. For this two compounds, the residues found in milk and milk products can be traced back to commercial feed mixtures and concentrates (beets waste) and also in cow-forage.
Some pesticides such as aldrin, heptachlor, methoxychlor, and in most cases DDT or metabolites, were not found. Numerous samples contained hexachlorobenzene (HCB) residues but with very low contamination level. PCB or anthelmintic residues were not found in the control samples.
The acceptable daily intake (A.D.I.) of these pesticides is compared with the real intake on the basis of milk fat consumption. Awaiting European Tolerance (C.E.E.) levels for pesticide residues in feed products, new regulations and official recommendations are showed and discussed