Chlamydia IgG Antibody (Serum) – Qualitative

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms of chlamydia (such as unusual discharge, pain during urination, or pelvic pain), if you’ve been exposed to chlamydia, or as part of routine screening (especially for sexually active individuals). It may also be used to monitor treatment response or assess risk for complications like infertility.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample drawn from a vein in your arm. The test is usually done in a lab setting and may take a few minutes. Avoid alcohol or certain medications for 24 hours before testing if instructed by your provider.

What the Test Results Mean

A positive result indicates the presence of IgG antibodies, suggesting you’ve likely had past exposure to chlamydia. A negative result means no detectable antibodies were found at this time. Results do not confirm or rule out current infection—additional testing (such as nucleic acid amplification tests) may be needed for active chlamydia.

Common Causes of False Results

False negatives are possible if the test is taken too early after exposure or if you’re currently infected but antibodies haven’t yet developed. False positives are rare but can occur due to cross-reactivity with other infections or laboratory errors. Discuss your medical history with your provider to interpret results accurately.