IgG Antibody to *Coccidioides* (Serum)

Why This Test Is Done

Your healthcare provider may order this test if you live in or have traveled to areas with high risk for *Coccidioides* exposure, such as parts of the southwestern United States, Mexico, or certain regions of South America and Africa. Symptoms like fever, cough, or fatigue may also prompt testing, especially if you’ve had recent travel or occupational exposure.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, usually drawn from a vein in your arm. The test is quick and typically done in a clinic or lab setting.

What the Results Mean

Positive results indicate the presence of IgG antibodies, suggesting past exposure to *Coccidioides*. However, antibodies may remain for years even after infection resolves. False positives can occur in rare cases, so follow-up testing may be needed for unclear results.

Possible Symptoms Linked to This Test

If you have symptoms like persistent cough, chest pain, or fatigue—especially after exposure to high-risk areas—this test may be used alongside other evaluations to assess for fungal infection.