[Health status of persons with acute radiation sickness caused by Chernobyl AES accident].

After Chernobyl accident 75 survivors with acute radiation syndrome (ARS) have been under observation in the Clinic of the Institute of Biophysics. Years after accident serious problems occurred in the individuals, who suffered from late effects from radiation injuries (late radiation ulcers and radiation cataracts). One patient suffered on hypernephroma, one-kidney cyst.

[The level of lymphocytes in the peripheral blood as a criterion of the degree of severity of acute radiation sickness (based on materials from the accident at the Chernobyl Nuclear Power Station)].

A study was made of the peripheral blood lymphocyte level as a function of gamma-radiation dose after single gamma-radiation attack resulted from Chernobyl disaster. After the initial drop an average level of lymphocytes was stabilized by day 2 after exposure and no further systematic decrease in the number of lymphocytes occurred. The accuracy of prognostication of the severity of acute radiation sickness, determined by the average lymphocyte level on days 3-6 amounted to as low as 50%.

[Proliferative activity and frequency of chromosome aberrations in the 1st mitosis in 50-, 60- and 70-hour cultures of irradiated lymphocytes and in mixed cultures of irradiated and non-irradiated cells].

Proliferative activity and frequency of chromosome aberrations during the first mitosis were comparatively studied in 50-, 60- and 70-h cultures of human peripheral blood lymphocytes after gamma-irradiation in vitro with doses of 6 and 8 Gy, and also in mixed cultures of irradiated and nonirradiated cells. It was shown that radiation-induced delay in proliferation is dissimilar for cells with different number of chromosome aberrations.

[Comparative study of the basic immunological reactions for assessing tularemia immunity in inoculated persons or those who have had the disease].

In the comparative study of immunological tests used for the determination of immunity to tularemia in vaccinees the greatest number of persons with the positive reaction was detected by means of the tularine skin test. Former tularemia patients retained allergic skin reaction to this test irrespective of the time of the disease.