实验室诊断军团菌感染的根据是:①取材培养分离出病原菌;②从体液查出抗原;③从血清查出特异抗体。作者检查经X 线确诊的小儿肺炎150例,入院时和入院后7～12天取双分血清检查抗嗜肺性军团菌抗体,结果有17.3%抗体效价上升4倍以上而确诊为军团菌肺炎。大多数是学龄前和学龄儿童,1岁以内者只7.6%.多在春季发病,88.9%在2～6月份入院。大多数合并呼吸系病毒感染,常有急性呼吸系感染史。本病发病急,有发热、全身中毒症状和呼吸功能不全三联征。体温升高1～2天后渐下降,重又升 Laboratory diagnosis of Legionella infection is based on: ① culture isolated from pathogens; ② antigen detected from the body fluid; ③ specific antibodies detected from the serum. The authors examined 150 cases of pediatric pneumonia diagnosed by X-ray. At admission and 7-12 days after admission, anti-Legionella pneumophila antibodies were screened by double sera. As a result, 17.3% of antibody titers rose more than 4-fold and were diagnosed as Legionella pneumonia. Most were preschool and school-age children, with only 7.6% being within 1 year of age, mostly in the spring, and 88.9% admitted in 2-6 months. Most combined respiratory virus infection, often with a history of acute respiratory infection. The incidence of acute disease, fever, systemic symptoms of poisoning and respiratory insufficiency triad. 1 to 2 days after the temperature gradually decreased, heavy again