Methods The DNA of mycoplasma in nasopharyngeal swabs was detected by PCR in 485 children with respiratory tract infection, and serum circulating immune complex (CIC), IgG, IgM, MP IgM, and CH50 were measured on the same day in 45 children with pneumonia.

• 方法对485例有呼吸道感染的患儿进行血清抗肺炎支原体(mycoplasma pneumoniae,MP)IgM和咽拭子MPDNAPCR检测,同时对45例肺炎患儿进行血清IgG、IgM、总补体活性(CH50)和循环免疫复合物(CIC)测定。