At a Glance Why Get Tested? To screen for or diagnose a
chlamydia infection When to Get Tested? For screening: may be
recommended if you are sexually active, pregnant or considering
pregnancy, or at increased risk for this sexually transmitted
disease (STD) For diagnosis: when you have symptoms of this STD,
such as such as vaginal discharge and abdominal pain (for women)
or unusual discharge from the penis or pain on urination (for
men); when a newborn has conjunctivitis A swab or brush of cells
or secretion from the infected area or a first-catch urine
sample Test Preparation Needed? Tell your doctor about use of
antibiotics or, for women, douches or vaginal creams within 24
hours before testing vaginal samples, as they may affect test
results. You may be instructed to wait one to two hours after
you last urinated before collecting a urine sample. Follow any
instructions you are given. The Test Sample What is being
tested? This test is looking for evidence of infection by the
bacterium Chlamydia trachomatis.