cut i reaction

(ku"t![-re-ak's hun) [cutis, skin, -freaction.'] An irritative or inflammatory reaction in the skin, in certain infectious (usually (ihronic) diseases, following the application of an extract of the organism causing the infection used as a diagnostic measure, most frequently in tuberculosis, but also for glanders, leprosy, typhoid fever, tinea, and syphilis; there are three modes of obtaining the reaction, viz., the cutaneous, the intracutaneous, and the percutaneous; see Lautier, Ligniires, Mora, and Pirquet. difieren'tial c, simultaneous inoculation of concentrated old tuberculin, a filtrate of human tubercle bacilli, and a filtrate of bovine tubercle bacilli, the