[Dynamics of the chromosome aberrations in the bone marrow cells of monkeys after prolonged irradiation].

The effect of prolonged gamma-irradiation with doses of low intensity (3.87 microA/kg) was studied in the bone marrow cells of monkeys (Macaca rhesus). The cumulative dose was 214.14-221.88 mC/kg. Statistically significant differences in the frequency of chromosome aberrations and the percentage of polyploid bone marrow cells, as compared to the level of spontaneous aberrations, were observed during 42 months following the exposure.