Residues in Egg Yolks and Raw and Cooked Tissues from Laying Hens Administered Selected Chlorinated Hydrocarbon Insecticides

Abstract

INTRODUCTIONTHE persistence of insecticide residues in animal products such as meat, milk and eggs, is of considerable importance. The slow depletion from animal tissues and the toxicity of many insecticides are two areas of research endeavor that have commanded considerable attention in recent years. Insecticide residues appear in animal tissues through exposure of animals to contaminated environments or through the consumption of feed contaminated with residues.Insecticide residues found in animal tissues appear in highest concentration in the adipose tissue. Presumably due to a smaller percentage of body fat, a higher concentration of insecticide residues on a fat basis has been reported to occur in adipose tissue of chickens than in the adipose tissue of cattle, hogs, or lambs (Gannon et al., 1959; and Terriere et al., 1959).Although there have been numerous reports concerned with insecticide residue contents of chicken tissues and eggs, more information is needed in .