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Leprosy (Hansen’s disease) 

Leprosy (Hansen’s disease)
Leprosy (Hansen’s disease)

Diana N.J. Lockwood


July 30, 2015: This chapter has been re-evaluated and remains up-to-date. No changes have been necessary.


Caution on use of thalidomide to treat Type 2 (ENL) reactions.

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date: 24 September 2021

Leprosy is a chronic granulomatous disease caused by Mycobacterium leprae, an acid-fast intracellular organism not yet cultivated in vitro. It is an important public health problem worldwide, with an estimated 4 million people disabled by the disease. Transmission of M. leprae is only partially understood, but untreated lepromatous patients discharge abundant organisms from their nasal mucosa into the environment....

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