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Tuberculosis

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Tuberculosis: delayed hypersensitivity skin test

image of Tuberculosis: delayed hypersensitivity skin test

Credits

Arthur Ammann, MD, Global Strategies for HIV Prevention

Description

Tuberculosis skin test. Certain infections such as tuberculosis and candidiasis or immunizations with bacillus Calmette-Guérin (BCG) or mumps vaccine result in induration of the skin after 24 to 48 hours. This indicates immunity to the organism and is a sign of intact immunity. HIV-infected patients often lack delayed hypersensitivity reactions to organisms to which they have been infected.