A chronic, mildly contagious disease of tropical and subtropical regions, caused by the bacterium Mycobacterium leprae, marked by lesions of the skin and mucous membranes and damage to peripheral nerves and other organs that, if untreated, can progress to disfigurement, lack of sensation, and blindness. Also called Hansen's disease.
[Middle English lepruse, from leprus, leprous; see LEPROUS.]
lep·rotic (lĕ-prŏtĭk) adj.
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