Coccidioides precipitin


Coccidioides precipitin is a blood test that looks for antibodies to the fungus Coccidioides immitis, which causes the disease coccidioidomycosis.

Alternative Names

Coccidioidomycosis antibody test

How the test is performed


This test looks for the antibodies in the clear liquid portion of the blood, which is called the serum. An antibody defends the body against some bacteria, viruses, fungus, or other foreign substance. Certain cells tell the body to produce antibodies during an active infection.

How to prepare for the test

There is no special preparation for the test.

How the test will feel


Why the test is performed


Normal Values

No precipitins is normal. This means the blood test did not detect the antibody to Coccidioidies immitis.

What abnormal results mean


In this case, another test is done to confirm that you have an infection. See: CSF coccidioides complement fixation. This test is rarely done. It has mostly been replaced by immunodiffusion tests.

What the risks are



  • Excessive bleeding
  • Fainting or feeling light-headed
  • Hematoma (blood accumulating under the skin)

Special considerations



Blood test







  • Call 911 for all medical emergencies.
