What is the WHO case definition of leprosy?

Updated: Aug 24, 2018
  • Author: Darvin Scott Smith, MD, MSc, DTM&H; Chief Editor: Michael Stuart Bronze, MD  more...
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The WHO case definition of leprosy is M leprae infection in an individual who has not completed a course of treatment and has one or more of the following:

  • Hypopigmented or reddish skin lesions with loss of sensation

  • Involvement of the peripheral nerves as demonstrated by their thickening and associated loss of sensation

  • Skin smear positive for acid-fast bacilli

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