Coccidioides Ab by CF

Sample type: Serum

Other names: Coccidioides CF Antibody

Negative
Coccidioides Antibodies by Complement Fixation (CF) is a serological blood test used to detect antibodies produced by the body in response to the fungal pathogen Coccidioides immitis/posadasii. This test is employed in diagnosing and monitoring coccidioidomycosis, commonly known as Valley Fever, caused by Coccidioides infection.
Positive
IgG antibody is detected by CF testing. Any CF titer in cerebrospinal fluid (CSF) should be considered significant. A positive complement fixation test in unconcentrated CSF is diagnostic of meningitis. IgM and IgG precipitins are rarely found in CSF. However, when present, they are diagnostic of meningitis (100% specific). Since the ID test is 100% specific, it is helpful in interpreting CF results. Early primary antibody (IgM) found in coccidioidomycosis can be detected by the IgM-specific ID test. IgM precipitins may be detectable within 1 to 4 weeks after the onset of symptoms. The presence of IgG antibody parallels the CF antibody and indicates an active or a recent asymptomatic infection with Coccidioides immitis. Both IgG and IgM antibodies are rarely detected 6 months after infection. However, in some patients having disseminated infection, both IgG and IgM antibodies may be present for several years. IgM and IgG precipitins are not prognostic. The sensitivity of serologic testing (CF and ID combined) for coccidioidomycosis is >90% or primary symptomatic cases.

Useful for serologic testing for coccidioidomycosis should be considered when patients exhibit symptoms of meningeal infection and have lived or traveled in areas where Coccidioides immitis is endemic. Any history of exposure to the organism or travel cannot be overemphasized when coccidioidomycosis serologic tests are being considered.

Coccidioides Antibodies by Complement Fixation (CF) is a serological blood test used to detect antibodies produced by the body in response to the fungal pathogen Coccidioides immitis/posadasii. This test is employed in diagnosing and monitoring coccidioidomycosis, commonly known as Valley Fever, caused by Coccidioides infection.

This test is particularly useful for detecting meningitis (an inflammation of the protective membranes covering the brain and spinal cord) caused by the pathogen. A positive result indicates exposure to the fungus, but clinical correlation is necessary to determine the significance of the result. It's often used alongside other tests like immunodiffusion (ID) and IgM tests for a comprehensive diagnosis. The presence of antibodies suggests an active or recent asymptomatic infection, aiding in patient management and treatment evaluation.

Coccidioides Ab by CF
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