Coccidioides Antibodies, IgM & IgG (Valley Fever) Blood Test
Coccidioides Antibodies, IgM & IgG Blood (Valley Fever) Test (Labcorp)
This test looks for 2 types of antibodies to coccidioides. Coccidioides is a type of fungus that causes the disease Coccidioidomycosis, more commonly known as Valley Fever. The areas where coccidioides are most commonly found include the southwest United States, Mexico, and parts of Central and South America. Infection is typically caused by people breathing in fungal spores although the spores can also enter the body through open wounds or sores. Coccidioidomycosis most commonly affects the lungs but infection can spread to other parts of the body as well. Symptoms of Valley Fever can include fatigue, cough, fever, shortness of breath, headaches, muscle pain, and a rash on the upper body or legs. Most people recover on their own after several weeks but some may require anti-fungal treatment. Most cases of Valley Fever do not cause long-term health problems but a small percentage of people will develop complications with their lungs, nervous system, bones, or joints.
This test looks for both IgM and IgG antibodies. IgM antibodies typically develop shortly after an infection, are usually detectable within 1-3 weeks of the onset of symptoms, and begin to fade away at about 4-6 weeks. As IgM antibody levels decline, IgG antibodies develop. IgG antibodies can remain detectable for up to a year after a person has been successfully treated. Antibody testing can aid in diagnosing Valley Fever as well as help to differentiate it from other conditions that cause similar symptoms.
This test is typically ordered when a person has symptoms of valley fever, especially if they live in an area where coccidioides fungus is prevalent.
Turnaround for this test is typically 2-3 business days.
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Note: Result turn around times are an estimate and are not guaranteed. Our reference lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.