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Schick test
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Schick test

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Article History
Related Topics:
diphtheria
skin test
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Schick test, method for determining susceptibility to diphtheria; it laid the basis for inoculation against the disease. A minute amount of diphtheria toxin is injected into the skin of the forearm. Redness at the site of injection after three days indicates a positive reaction (absence of circulating antibody) or a false positive reaction (hypersensitivity to the toxin). A positive reaction can be distinguished by use of a control injection of the same amount of heated toxin (toxoid) into the other forearm. The Schick test was introduced in 1913 by Bela Schick (1877–1967), an Austrian pediatrician.

This article was most recently revised and updated by Kara Rogers.