lepromin

[lĕprə-mĭn]
n.
  1. An extract of human tissue infected with Mycobacterium leprae and used in skin tests to classify the stage and type of leprosy.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.