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DNA content in the mouse spermatogonia B and spermatid nuclei during treatment with insecticides.

The DNA content in nuclei of germ cells: spermatogonia B and spermatides in the maturation phase of male mice receiving commercial insecticide preparations commonly used in this country was cytophotometrically measured. The following insecticides were tested: 1% Metox-30 solution, containing 30% of methoxychlorine (p,p-dimethoxydiphenyltrichlorethane), 0,3% solution of Sadofos-30 containing 30% of malathione (1,2-dicarboethoxyethyl-0,0-dimethyldithiophosphate) and 0,3% solution of Foschlor-50 containing about 50% trichlorfon (2,2,2-trichloro-1-hydroxyethyl-0,0-dimethyl-diphosphonate). It was found that a statistically significant number of spermatogonium B and spermatide nuclei in the phase of maturation of the animals treated with the insecticides exhibited an abnormal DNA content as compared with the nuclei of control animals. The chromatin of these nuclei is also more sensitive to acid hydrolysis in Feulgen reaction.