A study of lindane in laying hens

Dynamics of lindane (gamma-hexachlorocyclohexane) distribution and elimination were studied in laying hens of SSL breed receiving orally either a single dose of 20 mg/kg body weight or via feed at 0.5, 5.0 and 20.0 mg/kg body weight for 30 consecutive days. The results showed that consumption of lindane did not affect the general health of the animals, production or quality of eggs. Gas chromatography showed that lindane was distributed in various organs and accumulated at detectable levels in liver, brain, fatty tissue and muscles. Significant amounts of lindane residues were found in eggs and could be detected for 60 days. A major portion of lindane was eliminated through faeces in the first 10 days after administration. The presence of significant amounts of lindane residues in eggs is particularly important due to their role in chicken reproduction and human nutrition. (author)