A cross-sectional descriptive study of clinical and serological prevalence of syphilis infection in people living with HIV and its effect on CD4+ T cells.

Context: The natural history of syphilis could be altered in the presence of HIV. It has been documented that syphilis infection increases the risk of HIV transmission by at least 3-fold.

Aims: The aim of the study was (1) to study clinical presentation of syphilis in HIV individuals, (2) to estimate seroprevalence of syphilis in HIV individuals, and (3) to study the effect of syphilis infection on CD4+ T cells.

Subjects And Methods: HIV-positive patients attending sexually transmitted infection clinic for a period of 1 year from June 2017 to May 2018 in the age group of 15-70 years were included in the study. A detailed history was taken; genital and dermatological examination was done. All patients were tested with VDRL and treponema pallidum hemagglutination assay (TPHA). Pearson's Chi-square test was used to compare categorical variables and Student's -test was used to compare continuous variables.

Results: Out of ninety study population, nine (10%) had clinical manifestations of syphilis. VDRL was positive with significant titers in all cases of syphilis. TPHA was positive in 88.9% of cases with clinical syphilis and 17.3% of cases without clinical manifestations of syphilis. Mean CD4 count was low among patients having syphilis infection compared to study population.

Conclusion: This study shows high prevalence of syphilis in HIV and highlights the importance of preventing and promptly treating syphilis in people living with HIV, as the active infection is associated with fall in CD4 count, which leads to opportunistic infections.