[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).

[Difficulties in serological diagnosis of HIV infection].

Using Abbott's kits for immunoenzymatic diagnosis of antibodies to the recombinant antigens of the HIV-1 retrovirus (EIA-II test which was higher valued than the EIA-I test of the previous generation of the same production) 16,480 examinations of the sera of high risk groups and foreign students were done. All positive or doubtful results of the EIA test were verified by the Western blot technique. The obtained results positive and doubtful are presented, and only four were not in agreement by both methods.