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为了解北京市２～１４岁健康儿童ＴＷＡＲ既往感染的状况及肺炎患儿ＴＷＡＲ急性感染的发病率，自１９９４年１１月，我们应用微量免疫荧光试验（ＭＩＦ），对北京市城区５０８名，郊区４５０名２～１４岁健康儿童进行血清流行病学调查，在同期对住院的９７例２～１４岁肺炎儿童进行ＴＷＡＲ的研究。结果表明，健康儿童中ＴＷＡＲ感染阳性率随年龄增长而升高。１３～１４岁可达３８％。儿童时期阳性率与性别无差异。肺炎患儿既感染阳性率与健康同年龄儿童无明显差异。９７例肺炎患７例诊断为急性ＴＷＡＲ感染，占７２．２％．９～１２岁发病率最高。并对其临床表现及实验室检查做简单介绍。
To understand the prevalence of previous TWAR infection in children aged 2 ~ 14 years in Beijing and the incidence of TWAR acute infection in children with pneumonia, we used MIF to test the prevalence of TWAR in 508 suburbs A total of 450 healthy children aged 2-14 years were enrolled in the sero-epidemiological investigation. TWAR was performed in 97 hospitalized children aged 2-14 years with pneumonia during the same period. The results showed that the positive rate of TWAR infection in healthy children increased with age. 13 ~ 14 years old up to 38%. Positive rate of childhood and no gender differences. Children with pneumonia both positive rate of infection and healthy children at the same age no significant difference. Ninety-seven cases of pneumonia were diagnosed as acute TWAR infection in 72 cases, accounting for 72.2%. The highest incidence of 9 to 12 years old. And its clinical manifestations and laboratory tests to do a brief introduction.