What are the mortality rates for leptospirosis?

Updated: Jul 08, 2021
  • Author: Sandra G Gompf, MD, FACP, FIDSA; Chief Editor: Michael Stuart Bronze, MD  more...
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The mild form of leptospirosis is rarely fatal, and an estimated 90% of cases fall into this category. The mortality rate in severe leptospirosis averages approximately 10%, but has been described as ranging from 5-40%. Elderly and immunocompromised people are at the highest risk of mortality overall. Most deaths occur from renal failure, massive hemorrhage, or acute respiratory distress syndrome (ARDS).

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