lepromin reaction

lep·ro·min re·ac·tion

a delayed hypersensitivity reaction at the site of an intradermal injection of a lepromin, such as the Dharmendra antigen or Mitsuda antigen, in a lepromin test; the reactions, such as the Fernandez or Mitsuda reaction, are variable, occurring in 48 hours or 3-5 weeks, but are uniformly negative in lepromatous leprosy, borderline leprosy, and mid-borderline leprosy.