Spherulin skin test
A normal result means you had no reaction (inflammation) to the antigen contained in the shot.
Note: Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.
An abnormal result (positive result) means you have been exposed to the fungus that causes the disease. However, the exposure may have been in the distant past and may not reflect a current infection. Many people who live in areas where this infection is common may have a positive result but not an active infection.
The test can be positive 2 to 21 days after you develop symptoms. However, many patients do not have a positive reaction even when they have the disease.
False-positives are possible. You may have a positive reaction when you have been exposed to a fungus other than the one that causes coccidiomycosis.
Chiller TM. Coccidioidomycosis. Infect Dis Clin North Am. 2003;17(1):41-57.
Mandell GL, Bennett JE, Dolin R. Principles and Practice of Infectious Diseases. 5th ed. London, UK: Churchill Livingstone; 2000:2746-2755.
Galgiani JN, Ampel N, Blair JE, et al. Coccidioidomycosis. Clin Infect Dis. 2005;41:1217-1223.