军团病是人体感染嗜肺军团杆菌(LDB)引起的一种呼吸道传染病, 1976年7月,第58届美国退伍军人协会宾夕法尼亚分会代表大会在费城召开。会后一个多月内,参加过这次会议的代表中有221人得了症状酷似肺炎的这种“怪病”。最初医生们把它当作肺炎治疗,但后来发现,患者胸痛,并有嗜睡、烦躁、抑郁、谵妄、神志模糊、定向障碍等 Legionnaires ’disease is a respiratory infection caused by the human body caused by Legionella pneumophila (LDB). In July 1976, the 58th Legion of the Legion of Pennsylvania Branch of the American Veterans’ Association was held in Philadelphia. Within a month or more after the meeting, 221 of the delegates who participated in the meeting got this kind of “strange disease” that resembles pneumonia. Initially doctors treated it as pneumonia, but later found that patients had chest pain and drowsiness, irritability, depression, delirium, confusion, disorientation, etc.