EIGHTYFIVE HIV SEROPOSITIVE SUBJECTS (M: 42;F:43) were compared with an equal number STD subjects negative for HIV. They formed 1.6% of the total number (N =5287) screened in the STD OP. Heterosexual transmission was predominant. A significantly higher promiscuity and a larger number of sex partners and contacts were observed in the female but not the male HIV subjects. The ages at first coital experience were similar in both the groups. There was no difference in the occurrence of either STDs or psychiatric illness at index examination between the two groups. The symptom profile of psychiatric illness in the HIV subjects did not differ from that of the controls. The HIV subjects had more of physical diagnoses than the controls. The psychological responses to the 'disclosure' of seropositivity were noted. The closeness of HIV and STD groups on many factors and its implication for management and health education are commented upon.