#chlamydia

Increases in syphilis have been driven by new cases in men who have sex with men, an estimated half of whom have HIV.

Having both chlamydia and high-risk HPV16 dramatically increases the risk of anal precancer.

The first-ever vaccine against the common sexually transmitted infection appears safe and active.

Previously, tests were approved only for use with genital or urine samples.

Untreated sexually transmitted infections can lead to pelvic inflammatory disease, which can complicate women’s ability to get pregnant.

Douching before receptive anal sex may damage the delicate lining of the rectum and flush out protective bacteria.

A quarter of study participants accounted for three-quarters of newly diagnosed cases of chlamydia, gonorrhea and syphilis.

New HIV cases in the city remain higher than those in Los Angeles County and the state.

The diagnosis rate fell by 50 percent in just two years among gay and bi men who attended sexual clinics at least twice in one year.

Having a rectal sexually transmitted infection is associated with a higher risk of testing positive for HIV in this population.

But gay men living with untreated HIV did see higher viral loads if they also had a sexually transmitted infection, says a new study.

Meanwhile, new analyses of gonorrhea have raised concern at the CDC about emerging drug resistance.

Researchers found it remarkable that such a short intervention could have such a dramatically positive effect.

April is STD Awareness Month.

An annual surveillance report on STIs and other blood-borne illnesses also found that new cases of hepatitis B are down among youths.

The news first broke in February about a man in Amsterdam who contracted non-drug-resistant HIV while apparently adhering well to PrEP.