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[Influence of chronic intoxication with phospho-organic insecticide dimethoate on the hemopoietic system in rats].

Toxic effect of insecticide dimethoate applied to 400 rats for two years in concentrations of 2 to 200 mg/kg fodder was investigated. During the last six months of observation the toxic influence of the larger doses of this preparation was manifested by a higher mortality of the animals. Neither disadvantageous influence upon the maturation of each individual haemopoietic series, nor action inducing pathologic proliferation in the haemopoietic system of rats were found.