Aspergillus antigen skin test
Definition
Aspergillus is a mold. An antigen is a substance that stimulates the immune system to eliminate or fight foreign substances in the body. This skin test detects hypersensitivity to aspergillus.
Alternative Names
How the Test is Performed
The test site (an area with hair, usually the forearm) is cleansed. The antigen is then injected into the area. If there is a positive reaction, the area should turn red and develop a lump (similar to a mosquito bite) within ten minutes of injection. The lump should be at least 3 millimeters in diameter to be considered positive.
How to Prepare for the Test
There is no special preparation necessary.
How the Test Will Feel
There will be a brief sting as a needle is inserted just below the skin surface.
Why the Test is Performed
The test is to detect hypersensitivity to the mold aspergillus.
Normal Results
A negative reaction or no inflammation at the test site is normal.
What Abnormal Results Mean
If a positive reaction occurs (the test site is inflamed), you are hypersensitive to the aspergillus mold. You may have the disease known as pulmonary aspergillosis.
Risks
There is a slight risk of anaphylactic shock (a severe reaction).
Considerations
Not applicable.
Reviewed By: Kenneth Wener, M.D., Division of Infectious Diseases, Beth Israel Deaconess Medical Center, Boston, MA. Review provided by VeriMed Healthcare Network.
