[Rapid spread of HIV infections among narcotic addicts].

In the Institute of Venereology, 5351 patients (75.1% of males, 24.9% females), intravenous drug users (IVDU), have been tested for the presence of HIV antibodies in the period from Jan 1986 to Dec 31 1989.

[Prevention of HIV infection among drug addicts].

The studied group comprised 2651 patients from detoxication centres and dehabituation treatment institutions who were addicts taking intravenous drugs (71.5% males and 28.5% females).

[Incidence of HIV infection among homosexuals].

In the period 1985-1988 blood samples were examined of 1297 homosexual and bisexual men. The samples were sent by health service units from the whole country. Anti-HIV antibodies were demonstrated by the EIA method and confirmed by the Western blot technique in the serum of 35 subjects (2.

[The course of early syphilis in morphine base-dependent rabbits].

Eleven rabbits made dependent on morphine base were observed which were infected with syphilis studying the clinical and serological course of the infection. The control group comprised five non-dependent rabbits infected with syphilis. After 30 days from the infection all animals were given procaine penicillin in daily doses of 75,000 mu/kg.