lepromin test
(for certain types of leprosy) after intradermal injection of lepromin (q.v.), a positive reaction consists of either a tuberculin-type reaction at 48 to 72 hours (Fernandez reaction) or a nodular, occasionally ulcerated, lesion at 3 to 4 weeks (Mitsuda reaction). The test is not diagnostic; a large fraction of the normal population exhibits positive reactivity owing to sensitivity to cross-reacting antigens. In individuals known to have leprosy, a positive result on this test is indicative of tuberculoid or borderline tuberculoid leprosy, and lack of reactivity is indicative of lepromatous or borderline lepromatous leprosy.
Lepromin test; positive reaction at four weeks.
Medical dictionary.
2011.