Tuberculin skin testing in intravenous drug users: differences between HIV-seropositive and HIV-seronegative subjects.

The prevalence of tuberculin skin test reactions among intravenous drug abusers and differences in tuberculin skin test positivity between HIV-seropositive and HIV-seronegative subjects were evaluated in a cross-sectional study of 1131 subjects. They were recruited from a therapeutic community, from those who attended the centre for the treatment of drug addiction and from those who visited for any reason an acute tertiary-care hospital in Vitoria-Gasteiz, Basque Country (Spain). All subjects underwent skin testing with purified protein derivative (PPD) tuberculin and testing for HIV antibodies.