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    Leprosy (Hansen's Disease) Fact Sheet

    PDF Version of this Fact Sheet

    Leprosy is caused by a bacterium called Mycobacterium leprae

    Leprosy is a bacterial disease of the skin and nerves, which can progress to involve internal organs if it is not treated. In some forms of leprosy, the upper airway (nose and throat) may be affected. Leprosy is more common in parts of Asia, Africa, and Latin America than it is in the United States. Most cases in the United States occur among immigrants and refugees living in California, Florida, Hawaii, Louisiana, Texas, Puerto Rico, and New York City.

    Anyone can get leprosy, but it is rarely seen in children younger than 3 years old

    How leprosy spreads is uncertain

    Leprosy is probably spread by close contact with people infected with Mycobacterium leprae. The bacteria may enter the body through the nose and broken skin. Untreated leprosy patients have millions of bacteria in the mucus from their noses.

    Symptoms of leprosy include:

    • Skin lesions which often cannot feel touch or pain
    • Nose bleeds
    • Nose congestion (“stuffiness”)
    • Hair loss (eyebrows, eyelashes, body hair)

    Leprosy can be treated with antibiotics

    Treatment for leprosy involves taking several antibiotics for at least 6 months and up to several years. In most cases, a person will lose the ability to infect others within days to months of starting treatment.

    Leprosy can be prevented

    Early diagnosis and treatment of leprosy may prevent spread of the disease. People living in the same household as an infected person and anyone else who comes into close contact with an infected person should be examined by a doctor and continue to be examined each year for at least five years.

    Leprosy is a reportable disease

    Doctors work with local health departments to evaluate people who have been in close contact with a person diagnosed with leprosy. They also work to make sure all those who need antibiotics receive them. There are no restrictions on working or attending school as long as a person is being treated correctly.