Chlamydia infectious disease

This trial tests two approved antibiotics—azithromycin (a single dose) and doxycycline (twice daily for a week)—to see which is more effective at curing genital chlamydia in young people aged 12-21 living in youth correctional facilities. Participants provide urine samples over a…

This completed phase 4 trial tested whether taking doxycycline for 3 days works as well as the usual 7-day course for treating chlamydia. About 526 men and women with confirmed chlamydia took either a 3-day or 7-day regimen, with placebo pills used to keep the study blinded. Part…

This study looked at better ways to screen teenagers (ages 15-21) for chlamydia and gonorrhea when they visit emergency departments. Researchers compared offering STI tests to everyone versus only to those with certain risk factors. The goal was to find the most effective and cos…

This study tested a strategy of using rapid, point-of-care diagnostic tests for sexually transmitted infections (STIs) in pregnant women attending antenatal clinics in Zimbabwe. Over 1,000 women were offered testing for chlamydia, gonorrhea, trichomoniasis, syphilis, and hepatiti…

This trial tests a strategy called expedited partner therapy (EPT) for men who have sex with men in Peru. When a participant is diagnosed with gonorrhea or chlamydia, they receive antibiotic packets to give to their recent sexual partners, so those partners can get treated withou…

This study tested a pop-up clinic inside a van for women who inject drugs and exchange sex in north Seattle. The goal was to see if offering HIV prevention pills, addiction medications, and quick STI testing in a convenient location would help more women start and stay on these t…

This study tested a mobile program called Comunică to help Romanian gay and bisexual men reduce HIV risk and heavy drinking. 300 participants used their phones or laptops to complete surveys and eight one-hour sessions with a counselor or by reading health information. The progra…

This completed study looked at 59 men who have sex with men and use methamphetamine. Researchers used a program that gives rewards for drug-free urine samples to help them cut back. They measured inflammation in the rectum and tracked STI/HIV risk behaviors over 8 weeks. The goal…

This study tested whether a pay-it-forward approach—where one person's donation covers testing for the next person—could increase gonorrhea and chlamydia testing among men in China. Over 1,200 men who had sex in the past year but hadn't been tested recently took part. The goal wa…