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Aspergillus antigen skin test

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Illustrations

Aspergillus antigen skin test
Aspergillus antigen skin test

Alternative names    Return to top

Immediate Aspergillus skin test

Definition    Return to top

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.

How the test is performed    Return to top

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    Return to top

Infants 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 feel    Return to top

There will be a brief sting as a needle is inserted just below the skin surface.

Why the test is performed    Return to top

The test is to detect hypersensitivity to the mold aspergillus.

Normal Values    Return to top

A negative reaction or no inflammation at the test site is normal.

What abnormal results mean    Return to top

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.

What the risks are    Return to top

There is a slight risk of anaphylactic shock (a severe reaction).

Special considerations    Return to top

Not applicable.

Update Date: 1/26/2004

Updated by: Daniel Levy, M.D., Ph.D., Infectious Diseases, Greater Baltimore Medical Center, Baltimore, MD. Review provided by VeriMed Healthcare Network.

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