Introduction:Sexual contact is the most common mode of HIV transmission in India. Sexually transmitted infections (STIs) commonly co–exist in HIV patients due to common mode of transmission and may help in early diagnosis of HIV.

Aim: To study the incidence of HIV among patients attending STI clinic of Dermatology OPD of JLN hospital, Ajmer, Rajasthan.

Material and Methods: All STI patients were counselled to undergo HIV testing. HIV diagnosis was made by SD Bioline, Comb AIDS and Tridot tests. Analysis was made regarding incidence of HIV and type of STI in HIV positive patients.

Results:Out of the 3875 STI patients tested for HIV, 62 (1.6%) patients turned out to be positive.  It was observed that most common STI in HIV patients at the time of diagnosis was herpes genitalis followed by candidal balanoposthitis, candidal vulvovaginitisand trichomoniasis.

Conclusion:STI patients are considered“at–risk group” for HIV. STIs increase chances of HIV transmission and acquisition manifold. All STI patients should be counselled to undergo HIV testing for early diagnosis of HIV. Early detection of these cases will help contain spread of HIV in the community by reducing transmission.