Histoplasma skin test

How the test is performed:

The test site (an area with hair, usually the forearm) is cleansed. The allergen is then injected just below the skin surface. The test is read at 24-hours and at 48 hours. Occasionally, the reactions may not be present until the 4th day.

How to prepare for the test:

Adult:
No special preparation is necessary for this test.

Infants and children:
The physical and psychological preparation you can provide for this or any test or procedure depends on your child's age, interests, previous experience, and level of trust. For specific information regarding how you can prepare your child, see the following topics as they correspond to your child's age:

• infant test or procedure preparation (birth to 1 year)
• toddler test or procedure preparation (1 to 3 years)
• preschooler test or procedure preparation (3 to 6 years)
• schoolage test or procedure preparation (6 to 12 years)
• adolescent test or procedure preparation (12 to 18 years)

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:

To see if the individual has been exposed to the microorganism that causes histoplasmosis.