Revelations on the History of Leprosy in the Americas

Leprosy existed in America long before the arrival of Europeans: a new study reveals the history of a neglected pathogen.

Long considered a disease brought to the Americas by European colonizers, leprosy may actually have a much older history on the American continent. Scientists from the Institut Pasteur, the CNRS, and the University of Colorado (USA), in collaboration with various institutions in America and Europe, reveal that a recently identified second species of bacteria responsible for leprosy, Mycobacterium lepromatosis, has been infecting humans in the Americas for at least 1,000 years, several centuries before the Europeans arrived. These findings will be published in the journal Science

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