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What is this test?

The Aspergillus fumigatus IgG antibody test is a blood test that detects specific IgG antibodies in your serum. IgG antibodies are proteins produced by your immune system in response to an infection. This test helps determine if your body has been exposed to Aspergillus fumigatus, a common mold found in soil, decaying vegetation, and indoor environments.

Why is this test performed?

This test is primarily ordered to help diagnose aspergillosis, a fungal infection caused by Aspergillus species. It is especially important for patients with weakened immune systems, such as those who have had organ transplants, chemotherapy, or have HIV/AIDS. The test can help differentiate between current active infection and past exposure.

How is the test performed?

A healthcare professional will draw a blood sample from a vein in your arm using a small needle. The blood is collected into a tube and sent to a laboratory for analysis. The test measures the presence and quantity of IgG antibodies specific to Aspergillus fumigatus in your blood.

What do the results mean?

Results are reported as positive or negative, or may include antibody levels. A positive result indicates that IgG antibodies to Aspergillus fumigatus have been detected, suggesting either a current or past infection. A negative result means no antibodies were detected, which could indicate no infection, very early infection, or a compromised immune system that cannot produce antibodies. Your doctor will interpret results alongside your clinical symptoms, imaging studies, and other laboratory tests.