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What is this test?

The Aspergillus flavus antibody test is a laboratory test performed on cerebrospinal fluid (CSF), which is the clear fluid that surrounds and protects the brain and spinal cord. This test detects whether your immune system has produced specific antibodies (proteins that fight infection) against Aspergillus flavus, a type of fungus that can cause serious infections.

Why is this test performed?

Your doctor may order this test if you have symptoms of a fungal infection in the brain or nervous system, such as fever, headache, confusion, seizures, or neurological problems. It is particularly useful for diagnosing aspergillosis, a condition caused by Aspergillus fungi that can spread to the brain, especially in people with weakened immune systems, such as those with HIV/AIDS, organ transplant recipients, or patients undergoing chemotherapy.

How is the sample collected?

The test requires a sample of cerebrospinal fluid, which is collected through a procedure called a lumbar puncture or spinal tap. During this procedure, a healthcare provider inserts a thin needle into the lower back to withdraw CSF from the space around the spinal cord. The sample is then sent to a laboratory for analysis.

What do the results mean?

Results are typically reported as positive or negative. A positive result means that antibodies to Aspergillus flavus were detected in your CSF, suggesting that you have or recently had an infection with this fungus. A negative result means no antibodies were detected, which could mean you do not have an Aspergillus infection, or that the infection is very early and antibodies haven't developed yet. Your doctor will interpret these results along with your symptoms, other test results, and imaging studies to make a diagnosis.