Which sexually transmitted infection is commonly associated with bacterial vaginosis?

Bacterial vaginosis (BV) is associated with an imbalance in the normal bacteria found in the vagina, leading to symptoms such as discharge, odor, and irritation. While it is not classified as a traditional sexually transmitted infection (STI), it can be influenced by sexual activity and is often found in individuals who are also diagnosed with other STIs.

Trichomoniasis, a parasitic infection caused by the Trichomonas vaginalis organism, is the correct association with bacterial vaginosis due to the tendency for both conditions to coexist. Women with BV are at a higher risk of contracting trichomoniasis, and the presence of trichomoniasis can also predispose women to BV.

In contrast, HIV, syphilis, and chlamydia do not have the same direct correlation with bacterial vaginosis although they are also STIs. The connections between BV and these other infections revolve around overall sexual health, risk factors, and the microbiological environment of the vagina, but they are not most commonly associated with BV in the same way trichomoniasis is.