Coccidioides antibody (IgG) – Serum

What Does This Test Measure?

The test detects IgG antibodies, which are part of your immune system’s response to *Coccidioides*. These antibodies develop after your body has been exposed to the fungus, often weeks or months after infection. IgG antibodies are typically present in people who have had an infection in the past or are currently fighting an active infection.

Why Might Your Doctor Order This Test?

Your doctor may recommend this test if you have symptoms like coughing, fever, chest pain, or fatigue, especially if you live in or have traveled to areas where *Coccidioides* is common. It may also be used to monitor treatment progress or check for past exposure in people with a history of risk factors, such as weakened immune systems or certain occupations.

How Is the Test Performed?

A blood sample is drawn from a vein in your arm. The sample is sent to a lab, where it is tested using an immunoassay method to detect IgG antibodies against *Coccidioides*. The results are compared to a standard to determine antibody levels.

What Are Possible Results?

Results can vary depending on the test sensitivity and your medical history. A positive result indicates the presence of IgG antibodies, suggesting past or current exposure to *Coccidioides*. A negative result means no detectable antibodies were found in this sample, but this does not rule out infection in all cases.