REACTION

r at the line of contact of the two serums. eund’s r., splitting up of cancer-cells by the serum of non-cancerous individuals. fuchsinophil r., certain substances when stained in fuchsin retain the stain on being treated with picric acid alcohol. Ghilarducci’s r., contraction of the muscles of a limb when the active electrode is placed on a part somewhat removed from them. Gmelin’s r. See Gmelin’s test, under test. Gruber’s r., the agglutination reaction. hemiopic pupillary r., reaction in certain cases of hemianopia in which the stimulus of light thrown upon one side of the retina causes the iris to contract, while light thrown on the other side arouses no response. Called also Wernicke’s r. Henle’s r., the medullary cells of the adrenals stain dark brown on treatment with chromium salts. Hermann-Perutzr. Same as Peruts r. Herxheimer’s r., an inflammatory reaction produced in syphilitic ti ues following the ingestion of salvarsan, mercury, or other specific treatment, supposed to indicate failure of the drug to cure. Hirschberg’s r., an infectious disease resembling typhoid fever, but not due to organisms of the typhoid group. immunity r., any reaction or response on the part of a patient or an animal organism to bacterial and other infections; such, for instance, is the Widal test, the Noguchi reaction, etc. indophenol r. See indophenol test under fest. intracutaneous r., a reaction following an injection into the substance of the skin; the most common form is the reaction following such an injection of tuberculin. Jarish-Herxheimer r., increase of syphilitic symptoms sometimes following a too small dose of salvarsan or mercury. Jolly’s r., failure of response to faradic stimulation in a muscle, the power of voluntary contraction as well as the response to galvanic stimulation being retained. Klausner’s r., the formation of a flocculent precipitate when distilled water is added to fresh blood-serum in certain stages of syphilis and other infectious diseases. Krau ’s