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Radiation Protection Dosimetry 62:71-74 (1995)
© 1995 Oxford University Press

Frequency Changes of Inherited Anomalies in the Republic of Belarus After the Chernobyl Accident

G.I. Lazjuk, I.A. Kirillova, D.L. Nikolaev, I.V. Novikova, Z.N. Formina and R.D. Khmel

Complex cytogenetic, embryologic and clinical studies of possible genetic consequences of the Chernobyl nuclear accident for the population of Belarus have been carried out. They showed that groups of the population (pregnant women, fetuses, school children) had received biologically significant doses of radiation, as assessed by the registration of ring and dicentric chromosomes in blood lymphocytes. The study of more than 22,000 embryos and fetuses, and of 4090 neonates with compulsory registered congenital malformations, showed a considerable increase of anomalies of intrauterine origin since 1987. They correlated with the level of 137Cs contamination in the areas, but did not correlate with the preconception dose to the mother from the same radionuclide. Teratogenic effects of the Chernobyl pollution have not been conclusively identified. The increase of embryonal anomalies was mainly due to the group of multifactorial defects, and to the anomalies with a large contribution from dominant mutations. The Down's Syndrome incidence showed no increase.


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