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Pontiac fever is known to have a short incubation period of 1 to 3 days. No fatalities have been reported and cases resolve spontaneously without treatment. [8] It is often not reported. [9] Age, gender, and smoking do not seem to be risk factors. Pontiac fever seems to affect young people in the age medians of 29 to 32.
CDC investigators quickly discovered outbreaks of respiratory disease caused by L. pneumophila dating back to 1959. An outbreak of what was dubbed Pontiac fever occurred in a health department in Pontiac, Michigan in July 1967. No one died. [19] Although caused by the same bacterium, Pontiac fever is a milder ailment than Legionnaires' disease.
A legionellosis is any disease caused by Legionella, including Legionnaires' disease (a pneumonia) and Pontiac fever (a related upper respiratory tract infection), [10] but Legionnaires' disease is the most common, so mentions of legionellosis often refer to Legionnaires' disease. The bacterium is found naturally in fresh water. [4]
Legionella is a genus of gram-negative bacteria that can be seen using a silver stain or grown in a special media that contains cysteine, an amino acid.It is known to cause legionellosis [3] (all illnesses caused by Legionella) including a pneumonia-type illness called Legionnaires' disease and a mild flu-like illness called Pontiac fever. [3]
This is a list of Legionnaires' disease outbreaks; Legionnaire's is a potentially fatal infectious disease caused by gram negative, aerobic bacteria belonging to the genus Legionella. [ 1 ] [ 2 ] The first reported outbreak was in Philadelphia, Pennsylvania in 1976 during a Legionnaires Convention at the Bellevue-Stratford Hotel .
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Infection remains rare—about 10–50 cases of HPS occur each year in the US, most in spring and early summer and mainly in southwestern states. Infections usually occur at home or in the workplace when inhaling aerosols that contain rodent saliva or excretions. While treatment has improved, HPS still has a case fatality rate of around 40%.
About 60% of those infected with the virus will experience symptoms including fever, sensitivity to light, dizziness, nausea and vomiting, severe headache, joint and muscle pain, chills or skin rash.