Fairfield-Echo.com

(HealthDay News) -- Chlamydia is the most frequently reported bacterial sexually transmitted disease. It can be transmitted between sexual partners, or from an infected mother to a baby during childbirth, the U.S. Centers for Disease Control and Prevention says.

Many people never have symptoms, although some have fever, abdominal pain, nausea, abnormal vaginal or penile discharge, or discomfort while urinating.

Left untreated, chlamydia can lead to pelvic inflammatory disease, complications during pregnancy, or even infertility. Annual screening for sexually active people is recommended, and a positive diagnosis is typically treated with a round of antibiotics.