Chlamydia trachomatis IgG Antibody, Genital Tract (Serum/Plasma)

Why This Test Is Done

Your healthcare provider may recommend this test if you have risk factors for chlamydia, such as new or multiple sexual partners, or if you have symptoms like unusual discharge, pain during urination, or pelvic pain. It can also be part of routine screening for sexually active individuals. This test does not diagnose an active infection but can confirm past exposure, which may be important for counseling or further evaluation.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, usually drawn from your arm. If you’re tested for chlamydia antibodies, you may also have a separate test for current infection (e.g., nucleic acid amplification). Avoid alcohol or strenuous activity for 24 hours before testing if instructed.

What the Test Results Mean

A positive result means your body has produced IgG antibodies against *Chlamydia trachomatis*, suggesting past infection. A negative result means no detectable antibodies were found. Antibody levels don’t indicate whether you currently have an infection, so additional testing may be needed for active disease.

Possible Side Effects or Risks

Blood draws are generally safe but may cause mild discomfort, bruising, or slight bleeding at the site. Rarely, a reaction to the needle or infection at the site can occur. If you have a bleeding disorder or are on blood-thinning medication, let your provider know before testing.