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Legionnaires' Disease


Symptoms & Signs

What are the signs and symptoms of the infection?

Symptoms of Legionnaires' disease begin after an incubation period of 2 to 10 days. Common symptoms include the following:

  • chills
  • cough
  • fatigue
  • fever
  • headache
  • loss of appetite
  • muscle aches
  • shortness of breath
  • Following are some of the less common symptoms:

  • abdominal pain
  • diarrhea
  • mental changes, such as confusion
  • vomiting
  • Legionella pneumophila infections can cause symptoms in other parts of the body, including the heart. Symptoms are specific to the body part that is infected.


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