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Aspergillus antigen skin test
Alternative namesImmediate Aspergillus skin test
DefinitionAspergillus 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.
How the test is performedThe 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 testInfants and children:
The preparation you can provide for this test depends on your child's age, previous experiences, and level of trust. For general information regarding how you can prepare your child, see the following topics:
How the test will feelThere will be a brief sting as a needle is inserted just below the skin surface.
Why the test is performedThe test is to detect hypersensitivity to the mold aspergillus.
Normal ValuesA negative reaction or no inflammation at the test site is normal.
What abnormal results meanIf 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 .
What the risks areThere is a slight risk of anaphylactic shock (a severe reaction).
Special considerationsNot applicable.
Update Date: 1/26/2004Daniel Levy, M.D., Ph.D., Infectious Diseases, Greater Baltimore Medical Center, Baltimore, MD. Review provided by VeriMed Healthcare Network.
Last updated: Tue, 06 Jan 2009 00:20:03 GMT