A case of diffuse lepromatous leprosy due to Mycobacterium lepromatosis in Quintana Roo, Mexico.

A 43-year-old woman of Mayan origin from Quintana Roo, Mexico was diagnosed with diffuse lepromatous leprosy. The etiologic bacillus was determined to be Mycobacterium lepromatosis instead of Mycobacterium leprae. This case likely represents the first report of this leprosy form and its agent in the southeastern tip of Mexico.