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tuberculin test

noun
1.
a test for tuberculosis in which a hypersensitive reaction to a given quantity of tuberculin indicates a past or present infection.
Origin
1900-1905
1900-05
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for tuberculin test
  • Covered employees shall have a tuberculin test at the time of employment.
tuberculin test in Medicine

tuberculin test n.
Any of various skin tests used to determine infection with Mycobacterium tuberculosis, in which tuberculin or its purified protein is introduced into the skin by injection or tines.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Article for tuberculin test

procedure for the diagnosis of tuberculosis infection by the introduction into the skin, usually by injection on the front surface of the forearm, of a minute amount of purified protein derivative (PPD) tuberculin. Tuberculin is a protein substance from the tuberculosis-causing bacillus, Mycobacterium tuberculosis, first discovered and extracted by Robert Koch in 1890. When the test is positive, a region of swelling 10 mm (0.4 inch) or greater in diameter, usually accompanied by redness, occurs within 48 hours at the site of injection. A positive reaction indicates that the individual was previously exposed to the tubercle bacillus, but it does not necessarily indicate that active clinical tuberculosis is present, or ever existed. The test is a help to the physician in determining the source and time of an infection and in distinguishing tuberculosis from other pulmonary conditions

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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