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Legionella disease

Legionellosis is a clinical syndrome caused by Legionella bacteria. It was named after the outbreak of the epidemic when the Veterans' Congress was held in Philadelphia in 1976. Pathogenic bacteria mainly come from soil and sewage, which are transmitted by air and invaded from respiratory tract. According to the guidelines of the World Health Organization (who) in 2007, Legionella disease is divided into three subtypes: ① Legionella pneumonia (LD) Legionella infection with pneumonia as the main clinical manifestation, also known as Legionella pneumonia; ② Extrapulmonary syndrome is the spread of infection from the lung to other systems outside the lung; ③ Pontiac fever is mainly characterized by acute fever, and the course of disease is self limiting. The main pathogen of Legionella disease is Legionella pneumophila serotype 1. More men than women. The elderly, smokers, alcoholics and people with low immune function are prone to the disease.


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