Leprosy (Hansen's Disease)

Leprosy, also known as Hansen’s disease, is a rare disease caused by bacteria called Mycobacterium leprae and Mycobacterium lepromatosis. The bacteria grow very slowly, and it can take up to 20 years for someone to develop any symptoms. Leprosy can affect the nerves, skin, eyes, and lining of the nose. If left untreated, nerve damage can result in the crippling of hands and feet, paralysis, and blindness. Leprosy does not spread easily to others and treatment is very effective.

Leprosy 101

Information for providers

This is a Wisconsin disease surveillance category II disease:

Wisconsin case reporting and public health follow-up guidelines

Questions about Leprosy? Contact us!
Phone: 608-267-9003 | Fax: 608-261-4976

Wisconsin Local Health DepartmentsRegional officesTribal agencies

Last revised October 6, 2023