Leptospirosis: Symptoms & Signs

Medically Reviewed on 8/27/2020

Leptospirosis is an infectious disease. Leptospirosis occurs throughout the world and affects both animals and humans. The infection spreads by the urine of infected animals, both domesticated (including dogs and horses) and wild infected animals (such as rodents or wild pigs). Risk factors for the infection are close association with animals and water and soil contaminated with infected urine.

Signs and symptoms of leptospirosis include

Other associated symptoms and signs can include

About 5%-10% of those affected progress to a more serious form of the disease that can cause multiple organ failure (known as Weil's disease).

Cause of leptospirosis

Infection with the bacteria Leptospira interrogans causes leptospirosis.

Other leptospirosis symptoms and signs


Bowel regularity means a bowel movement every day. See Answer

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Jameson, J. Larry, et al. Harrison's Principles of Internal Medicine, 20th Ed. New York: McGraw-Hill Education, 2018.