Chlamydia is a sexually transmitted infection spread by having unprotected sex with someone infected with bacteria called Chlamydia trachomatis. These bacteria are found in the urine and genital secretions of infected people. Chlamydia can affect several areas of the reproductive system, causing urethritis, vaginitis, cervicitis, and pelvic. Chlamydia, or more specifically a chlamydia infection, is a sexually transmitted infection caused by the bacterium Chlamydia trachomatis. [3] Most people who are infected have no symptoms. [1] When symptoms do appear, they may occur only several weeks after infection; [1] the incubation period between exposure and being able to infect others is thought to be on the order of two to six weeks. Chlamydia is caused by Chlamydia trachomatis (truh-KOH-muh-tis) bacteria and spread through oral, vaginal or anal sex. You might not know you have chlamydia because many people don't have symptoms, such as genital pain and discharge from the vagina or penis. Chlamydia trachomatis affects mostly young women, but it can occur in both men and women and in all age groups. It's not difficult to. Chlamydia is a common sexually transmitted disease contracted by men and women. Chlamydia usually does not have symptoms. Learn about tests and prevention. Chlamydia is a bacterial infection that’s easily cured with antibiotics. Learn about the causes and cure for chlamydia. Chlamydia is a common sexually transmitted infection (STI) that can be treated. People who are sexually active can get chlamydia. This fact sheet answers basic questions about chlamydia. Chlamydia is one of the most common sexually transmitted infections (STIs). You can get chlamydia through vaginal, anal or oral sex with a partner who has chlamydia. STI Treatment Guidelines from CDC A meta-analysis and a Cochrane systematic review evaluated data from randomized clinical trials of azithromycin versus doxycycline for treating urogenital chlamydial infection determined that microbiologic treatment failure among men was higher for azithromycin than for doxycycline (748, 749). Observational studies have also demonstrated that doxycycline is. Chlamydia infection is often asymptomatic; however, when symptoms do occur, they may include unusual urethral and vaginal discharge. If left untreated, chlamydia infection can lead to serious health problems including pelvic inflammatory disease and infertility in women. Learn about chlamydia, including common symptoms in men and women, transmission risks, diagnostic testing, antibiotic treatments, and prevention.