Abstract
The excretion of 14C-labelled Cyolane, 24 hours after single oral application was found to be about 50% of the applied dose in urine, faeces and expired air. The activity of Acetylcholine esterase in brain, plasma and erythrocytes, and liver succinate dehydrogenase was studied for 16 weeks in 4 groups of rats after repeated orally daily doses of Cyolane, 0.9, 0.45, 0.09 and 0.045 mg/kg. It has been found that at all the dose levels there were cumulative inhibition effects in brain and blood choline esterase and liver succinate dehydrogenase till the 2nd week and then there was a recovery at low dose rates in blood choline esterase and liver succinate dehydrogenase activities. After 6 - 16 weeks the effects were nearly compensated. At higher doses almost all the rats died after 6 weeks due to the insecticide toxicity.
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