PPD skin test

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Positive ppd skin test

PPD skin test

Tuberculosis in the kidney

Tuberculosis in the lung

Purified protein derivative standard; TB skin test; Tuberculin skin test

There is a very small risk of severe redness and swelling of the arm in individuals who have had a previous positive PPD test and who undergo repeat testing. There have been a few cases of this reaction also occurring in individuals who have not been previously tested.

This test is widely used. However, its limitations include the fact that there are false negatives and false positives. In addition, a positive skin test does not necessarily mean that an individual has active tuberculosis. Additional studies are needed to verify whether active disease is present.

Review Date: 06/10/2005
Reviewed By: Eleftherios Mylonakis, M.D., Division of Infectious Disease, Massachusetts General Hospital, Boston, MA. Review provided by VeriMed Healthcare Network.