Also found in: Medical.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
(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.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.