英语词汇“koch's phenomenon”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	koch's phenomenon
释义	Koch's Phenomenon Koch’s Phenomenon (Koch’s reaction), the phenomenon of the altered reactivity of an animal or human body that has been sensitized to tuberculosis bacteria, first described by R. Koch in 1891. Koch’s phenomenon indicates tubercular infection in the body. Koch's phenomenon Koch's phenomenon A local inflammatory reaction resulting from injection of tuberculin into the skin of a person who has been previously exposed to the tubercle bacillus. The test represents the clinical application of a type IV (delayed-type) hypersensitivity reaction. In contemporary skin tests for tuberculosis, Koch's, or “old, ” tuberculin has been replaced by tuberculin purified protein derivative. See: tuberculosisSee also: Koch, Heinrich Herman Robert
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Koch's Phenomenon