Signs and Symptoms
Español: Signos y síntomas
Summarized below are the signs and symptoms for two illnesses caused by Legionella: Legionnaires’ disease and Pontiac fever.
Legionnaires' disease can be hard to diagnose because its symptoms are similar to other types of pneumonia and it often looks the same on a chest x-ray. Specific tests are needed to determine if a case of pneumonia is Legionnaires’ disease.
The most common symptoms of Legionnaires' disease include:
- Shortness of breath
- High fever
- Muscle aches
These symptoms usually begin 2 to 10 days after being exposed to the bacteria, but it can take longer so people should watch for symptoms for about 2 weeks after exposure.
Pontiac fever has many of the same symptoms as Legionnaires’ disease, primarily fever and muscle aches, but it is a milder infection. Symptoms begin between a few hours to 3 days after being exposed to the bacteria and usually last less than a week. Pontiac fever is different from Legionnaires' disease because someone with Pontiac fever does not have pneumonia.
- Page last reviewed: October 28, 2015
- Page last updated: January 26, 2016
- Content source: