The independent association between AUDs and having had a recent STI is of interest. The presence of STIs, especially ulcerative ones, facilitates HIV transmission [29]. Since the presence of STIs is an indicator of high-risk behaviors in general [30] and AUDs in our sample were associated with recent STIs, there is an urgent need to screen simultaneously for AUDs and acute HIV infection (AHI) among MSM presenting to STI clinics.