Residues in broiler chick tissues from low level feedings of seven chlorinated hydrocarbon insecticides

Two chlorinated insecticide feeding studies from 1967-1968, using broiler chicks, have been completed. In Study I, lindane, heptachlor epoxide, dieldrin, endrin, methoxychlor, and DDT were fed in combination at 3 levels: 0.05, 0.15, and 0.45 ppm. Data show that, in fat tissues, heptachlor epoxide attained a level approximately 20 times the respective levels in the feed; dieldrin 15 times; endrin 10 times; p,p'-DDT 9 times; lindane 3 times; and o.p'-DDT less than the feeding levels. Of the DDT metabolites, p.p'-DDE and p,p'-DDD, only p,p'-DDE was significant at 3 times the 0.45 ppm feeding level. Endrin ketone, a metabolite of endrin, reached plateau levels approximately equal to feeding levels. All residue levels in liver tissues were less than 0.02 ppm. In Study II, technical chlordane was fed singly at the 0.05, 0.15, and 0.45 ppm levels. Results are tabulated for both total chlordane and for 6 identifiable isomers. Total chlordane in fat tissues attained plateau levels 3-5 times the respective feeding levels. Total chlordane levels in liver and breast tissues were all less than 0.01 ppm.