What type of bacteria causes chlamydia?

Chlamydia trachomatis can enter mucous membranes during sexual contact and multiply within cells. Infection may affect the cervix, urethra, rectum or throat. Many people have no noticeable symptoms, which is why testing can matter even when someone feels well.

When symptoms occur, they can include painful urination, discharge, pelvic discomfort or bleeding between periods. A symptom such as painful urination has several possible causes and does not by itself establish chlamydia.

A clinician may recommend a urine sample or swabs from exposed sites. Share the type of sexual contact you had so the right sites are considered. If testing confirms chlamydia, take the prescribed antibiotic exactly as directed and discuss partner notification.

Avoid sexual contact until the clinician says treatment has had time to work and partners have been addressed. Do not use someone else’s medicine or stop early because symptoms improve.

Get prompt care for worsening pelvic or lower abdominal pain, fever, pain during sex, unusual bleeding, testicular pain or swelling, or pain in the side or back. These features can signal infection that needs examination and treatment without delay.

Ask which samples are needed, whether other STI tests are sensible, how partners should be informed, and what symptoms should trigger a follow-up visit.