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自从1977年分离出一种革兰氏阴性杆菌并提出按嗜肺性军团病杆菌(Legionella Pneumophila)分类以来,这一细菌与几个州的肺炎暴发有关。一些回顾性的研究指出,这个病原与1965～1976年之间发生的肺炎和急性发热性疾病暴发有关联。自从分离出细菌以来,报告的病例已明显增加,军团病(LD)从50个州的大多数中都有报告。
This bacterium has been associated with pneumonia outbreaks in several states since the isolation of a Gram-negative bacterium in 1977 and the classification of Legionella pneumophila. Some retrospective studies indicate that this pathogen is associated with an outbreak of pneumonia and acute febrile illness that occurred between 1965 and 1976. The reported cases have increased significantly since the isolation of bacteria, with Legionnaires’ Disease (LD) reported from most of the 50 states.