Pontiac fever is a mild flu-like sickness caused by Legionella bacteria exposure. It produces a moderate upper respiratory infection with symptoms similar to acute influenza. Pontiac fever cures spontaneously and is often misdiagnosed. The same bacterium may cause Pontiac fever and the more serious Legionnaires’ disease; however, Pontiac fever does not entail pneumonia.

Infection arises after inhaling aerosolized contaminated water. Legionella may infest microdroplets that are undetectable to the human eye. These bacteria, which are naturally found in the environment, develop very swiftly in water with a temperature range of 25 to 45 °C. As a result, artificial water systems are the primary source of pollution.


Pontiac fever is characterized by influenza-like symptoms, including extreme fatigue (asthenia), nausea, headache, high temperature, dry cough, and muscular pains (myalgia).

Symptoms may also include the following: 

  • Nausea
  • Vomiting
  • Diarrhea
  • chest discomfort


Pontiac fever is so mild that it is often missed by doctors. Because of this, the potential for contamination is probably understated.

The results of a microbiological test, however, are helpful. It’s useful for ruling out the flu as the cause of the illness and narrowing down the suspected bacteria. Several techniques are available, such as a urinalysis, a serology test, or a sputum culture from the lungs.


Unfortunately, like legionellosis, Pontiac fever has no preventative vaccination or therapy. However, with vigilant upkeep of potential infection sources, you may lessen your likelihood of contracting the condition.

There are certain natural responses that might be helpful:

  • Maintain a constant water flow and prevent any ponding.
  • Scaling and corrosion may be avoided if maintenance is tailored to the water and installation type.
  • Adjust the setting on the thermostat that controls the flow of hot water.
  • Regular self-evaluation is highly recommended.

Regularly performing self-checking tests lowers the risk and makes it possible to take immediate action in the event that the network is contaminated. Simple, fast, and trustworthy solutions exist. In addition to being low-cost and cutting-edge, these examinations may be executed in complete independence, either on location or in the comfort of one’s own home.

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