Legionellosis history and symptoms
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
History
- Legionnaires' disease typically manifests with pneumonia, which usually requires hospitalization and can be fatal in 10%–15% of cases.
- Approximately
- In contrast, clinical manifestations of Pontiac fever are milder than Legionnaires’ disease. Pontiac fever typically manifests with influenza-like illness (fever, headache, and myalgias) but no signs of pneumonia. Pontiac fever can affect healthy people, as well as those with underlying illnesses, and symptoms occur within 72 hours of exposure.
- Approximately 15%-20% of patients report a recent history of travel.
Common Symptoms
Symptoms of Legionnaires' disease may include:
- Chest pain
- Coughing up blood
- Fever
- Gastrointestinal symptoms, such as diarrhea, nausea, vomiting, and abdominal pain
- General discomfort, uneasiness, or ill feeling (malaise)
- Headache
- Joint pain
- Lack of coordination (ataxia)
- Loss of energy (fatigue)
- Muscle aches and stiffness
- Nonproductive cough
- Shaking chills
- Shortness of breath
Less Common Symptoms
A milder infection caused by the same type of Legionella bacteria is called Pontiac Fever. Symptoms may also include
However, there is no pneumonia.