[The immune response of viral hepatitis patients who use narcotic preparations].

The characteristics of cell-mediated and humoral immunity were studied in 611 patients with different etiological forms of acute virus hepatitides (HB, HC, HB + C, HC + HBsAg). As the result of the systematic abuse of psychoactive preparations, introduced by intravenous injection, in 166 patients (27.2%) drug addiction developed, ehile 445 (72.

[The prevalence of hepatitis B and C markers among narcotic users].

611 patients with acute parenteral virus hepatitis (VH) were studied with a view to find out markers indicating the presence of hepatitis B and hepatitis C virus infection (HB, HC, HB + C, HC + HBsAg). Of these, 166 patients (27.2%) systematically used narcotic drugs intravenously.

[The development of HIV infection in the Far-Eastern region of the Russian Federation].

By May 18, 1998, 108 HIV-infected persons were registered in the Far-Eastern region. In recent years young people using narcotic drugs were involved in the epidemic process. The sources of the infection were mainly migrants arriving to the Far East from the Ukraine.

[The prevalence of etiological forms of viral hepatitis in Khabarovsk].

For the first time the etiological structure of viral hepatitis in the Far East, in Khabarovsk, has been studied. The leading etiological form of viral hepatitis is hepatitis A. The spread of hepatitis B and nondifferentiated hepatitis is less than that of hepatitis A.

[Enzymatic activity of peripheral blood cells in experimental chronic myocarditis caused by persistent Coxsackie A virus].

Molecular mechanisms of metabolic modifications in blood cells were found to be associated with immunological tolerance to Coxsackie A virus in the modelling of chronic systemic diseases in rats. Blood cellular enzymatic activity correlated with morphological damage in internal organs. Cytochemical analysis is an informative test for investigating destructive and inflammatory changes in the affected organs.

[Assessment of th- quantity of mast cells in the organs of the gastrointestinal tract of rats and frogs].

A method of evaluation of mast cell concentration in which all the tissues of an organ are included gives statistically significant figures. This method showed mast cell concentration in the digestive tract organs of rats and frogs to be a fixed value within a morphofunctional zone. In the tongue the mast cell concentration was the same both along its length and in the symmetrical parts of the organ.