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Leptospirosis is a bacterial disease that affects humans and animals. It is caused by bacteria of the genus Leptospira. In humans, it can cause a wide range of symptoms, some of which may be mistaken for other diseases. Some infected persons, however, may have no symptoms at all.

Without treatment, Leptospirosis can lead to kidney damage, meningitis (inflammation of the membrane around the brain and spinal cord), liver failure, respiratory distress, and even death.

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Prevent Leptospirosis in Pets

To help prevent infection, keep rodent problems (rats, mice, or other animal pests) under control.

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Travelers' Health and Leptospirosis

Leptospirosis has worldwide distribution, with a higher incidence in tropical climates, especially after heavy rainfall or flooding due to hurricanes.

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Laboratory Submissions

Learn more about Special Bacteriology Reference Laboratory, and Zoonoses and Select Agent Laboratory

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