Legionellosis

Bol

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online.Legionellosis is an infectious disease caused by gram negative, aerobic bacteria belonging to the genus Legionella. Over 90% of legionellosis cases are caused by Legionella pneumophila, a ubiquitous aquatic organism that thrives in temperatures between 25 and 45 °C (77 and 113 °F), with an optimum around 35 °C (95 °F). Legionellosis takes two distinct forms: Legionnaires' disease, also known as "Legion Fever" (archaic), is the more severe form of the infection and produces pneumonia. Pontiac fever is caused by the same bacterium, but produces a milder respiratory illness without pneumonia which resembles acute influenza. Legionnaires' disease acquired its name in July 1976 when an outbreak of pneumonia occurred among people attending a convention of the American Legion in Philadelphia. On January 18, 1977 the causative agent was identified as a previously unknown bacterium, subsequently named Legionella. An estimated 8,000 to 18,000 people get legionellosis in the United States each year. Some people can be infected with the Legionella bacterium and have only mild symptoms or no illness at all.

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