Legionellosis risk factors

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Risk Factors

Most healthy individuals do not become infected with Legionella bacteria after exposure. Major risk factors that predispose to legionellosis include:[1]

  • Age (usually 50 years or older)
  • Recent travel with an overnight stay outside of the home
  • Current or former smokers
  • Exposure to whirlpool spas
  • Recent repairs or maintenance work on domestic plumbing
  • Chronic lung disease (namely COPD or emphysema)
  • Weakened immune system from diseases like cancer, diabetes, or kidney failure
  • Immunosuppressive drug therapy (post-transplant or chemotherapy)

References

  1. Top 10 Things Every Clinician Needs to Know About Legionellosis. Centers for Disease Control and Prevention. Accessed on August 5, 2015. http://www.cdc.gov/legionella/clinicians.html

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