Chlamydia psittaci IgG Antibody (Serum/Plasma)

What This Test Measures

The test detects IgG antibodies specific to *Chlamydia psittaci*, a bacterium linked to psittacosis—a contagious respiratory illness primarily spread through contact with infected birds or their droppings. IgG antibodies are typically present after an infection has resolved or if exposure occurred months or years earlier. This test helps identify whether your immune system has encountered this bacterium, though it does not confirm an active infection.

Why It’s Done

Your healthcare provider may order this test if you have symptoms like fever, cough, or difficulty breathing—especially if you’ve had recent contact with birds, bird products, or live poultry. It may also be used in investigations of unexplained respiratory infections or as part of routine screening for occupational groups at higher risk.

What to Expect

A blood sample is drawn from a vein in your arm. The sample is sent to a lab where it is tested for specific antibodies. Results are usually available within 1–3 business days. No special preparation is needed, but inform your provider about any medications or recent illnesses.

Possible Results and Interpretation

A positive result means detectable IgG antibodies are present, suggesting past exposure or infection. A negative result indicates no detectable antibodies, meaning either no exposure or infection occurred recently. False negatives are possible if testing occurs too soon after exposure. Consult your provider for interpretation based on your symptoms and medical history.