Chlamydia psittaci IgG antibody in serum/plasma (qualitative immunoassay)

What This Test Measures

The test detects IgG antibodies, your body’s immune response to *Chlamydia psittaci*. If present, it suggests prior exposure or infection, though acute illness may require additional testing (e.g., IgM). Antibodies take time to develop, so results may not reflect recent infection.

Why It’s Ordered

Doctors may order this test if you’ve had contact with birds (e.g., parrots, pigeons), work in poultry processing, or develop flu-like symptoms after exposure. It’s not a first-line test for active infection but supports broader evaluation.

Sample and Testing Notes

A blood sample (serum/plasma) is drawn, typically sent to a lab for immunoassay (e.g., enzyme-linked immunosorbent assay). Results are qualitative (positive/negative) and may not indicate recent illness; confirmatory testing could be needed.

Limitations and Considerations

False positives may occur with other infections (e.g., *Chlamydia pneumoniae*) or prior exposure. False negatives are possible if tested too early after exposure. Results alone don’t confirm active disease; clinical correlation is essential.