Serum IgG Antibody to *Coccidioides* (IgG Antibody to Coccidioides Immunoglobulin G)
This test measures the level of IgG antibodies in your blood to detect exposure to *Coccidioides*, a fungus found in certain soil regions. These antibodies help your immune system recognize past or current infection.
["This test helps identify if you’ve been exposed to *Coccidioides*, which can cause infections like coccidioidomycosis."]
Key facts at a glance
- LOINC
- 93835-7
- Short code
- Coccidioides IgM SerPl IA-aCnc
- Synonyms
- Coccidioides IgM SerPl IA-aCnc
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- ia
- CPT
- 82784
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
What Does This Test Measure?
The test looks for IgG antibodies specific to *Coccidioides*, a fungus that can live in soil in parts of the southwestern U.S., Central and South America, and parts of Africa and Australia. These antibodies develop after your body has encountered the fungus, often months after exposure. The presence of these antibodies suggests past infection or exposure, but they don’t always indicate an active illness.
Why Might You Need This Test?
Your healthcare provider may order this test if you live in or have traveled to a region with high risk for *Coccidioides*, have symptoms like cough, fever, or fatigue, or if you have a weakened immune system. It can also be used to monitor treatment in some cases.
What to Expect Before the Test
No special preparation is needed. You’ll provide a blood sample, usually drawn from your arm. The test is quick and typically done in a lab setting. If you’re on blood-thinning medication, let your provider know before the test.
What to Expect After the Test
After the blood is drawn, you may have a slight bruise or soreness at the site. You can resume normal activities immediately. Results are usually available within a few days, but timing can vary.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Positive results indicate exposure to *Coccidioides*, which can lead to infections ranging from mild flu-like symptoms to serious lung disease or other complications, especially in people with weakened immune systems. Negative results mean no detectable IgG antibodies were found, suggesting no past exposure or infection. This test is not used to diagnose active infection but can guide further evaluation or treatment planning.
Short name
IgG Antibody to Coccidioides
Frequently asked questions
How long does it take to get results from this test?
Can I have this test if I’m pregnant?
What are the possible side effects of this blood test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy