People with Legionnaires' disease have pneumonia (lung infection) since Legionella grow and thrive in the lungs. Pneumonia is confirmed either by chest x-ray or with a physical exam.
Healthcare professionals can also find Legionella in the body by doing a
- Urine (pee) test
- Laboratory test that involves taking a sample of sputum (phlegm) or a lung biopsy
Pontiac fever is a form of infection with Legionella that does not involve pneumonia. Patients can have fever, headache, and body aches for a few days but improve without antibiotic treatment. Healthcare professionals can use a urine or blood test to see if someone has Pontiac fever. However, a negative test doesn’t rule out that someone may have it (this is called a false negative). Healthcare professionals most often diagnose Pontiac fever when there are other known laboratory-confirmed legionellosis cases (either Legionnaires’ disease or Pontiac fever).Top of Page
- Page last reviewed: October 28, 2015
- Page last updated: October 28, 2015
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