lepromin test /leprō″min/ , a skin sensitivity test used to distinguish between the lepromatous and tuberculoid forms of leprosy. The test consists of an intradermal injection of lepromin, which is prepared from heat-sterilized Mycobacterium leprae. The appearance of a palpable nodule in 8 to 10 days is indicative of the tuberculoid form of leprosy. As no nodule appears in the lepromatous form, the test is not diagnostic of leprosy. The test is used only to follow the course of the disease. See also leprosy.
