SATURN STILLS / SCIENCE PHOTO LIBRARY SATURN STILLS / SCIENCE PHOTO LIBRARY
Urine chlamydia test. Urine from a sample bottle (right) being tested (left) for the sexually transmitted disease (STD) chlamydia. This disease is caused by the virus-like bacterium Chlamydia trachomatis. It can cause genital, eye and lymph node infections, as well as non-specific urethritis (inflammation of the urethra).
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