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选择甲型流感病毒阳性肺炎患儿４８例，健康儿童４２例，采用放射免疫法（双抗体－ＰＥＧ法）测定唾液ＳＩｇＡ含量，并观察ＳＩｇＡ含量与抗原清除的关系。结果显示：①肺炎组患儿唾液ＳＩｇＡ含量明显降低，与对照组相比，差异非常显著（Ｐ＜０．００１）。②唾液ＳＩｇＡ均值以上组较均值以下组抗原清除速度快，差异非常显著。提示：呼吸道局部使用ＳＩｇＡ可能对病毒性肺炎的恢复有促进作用。
Forty-eight children with influenza A pneumonia and 42 healthy children were enrolled in this study. The content of SIgA in saliva was determined by radioimmunoassay (double antibody-PEG method), and the relationship between SIgA level and antigen clearance was also observed. The results showed that: (1) The content of SIgA in saliva of children with pneumonia was significantly lower than that of the control group (P <0.001). ② saliva SIgA mean value of more than the following group of antigen removal speed is fast, the difference is very significant. Tip: Local use of respiratory tract SIgA may promote the recovery of viral pneumonia.