儿童肺炎支原体感染IgM 抗体和 DNA 检测结果的应用分析

Application Analysis of IgM Antibody and DNA Test Results in Children Mycoplasma Pneumonia Infection

目的：通过对肺炎支原体 IgM 抗体和 DNA 检验结果分布规律的分析，探讨其对儿童肺炎支原体感染诊断的应用。方法回顾性分析2013-2014年全年中国医科大学附属盛京医院0-16岁儿童肺炎支原体 IgM 抗体（MP-IgM）和肺炎支原体 DNA（MP-DNA）检测数据。其中 MP-IgM 114374人次；MP-DNA 8014人次，分析性别、年龄、季节等与该指标阳性率的关系；收集同时进行 MP-IgM 和 MP-DNA 检测的患者5106例，分析不同年龄两指标阳性结果的一致性。结果①不同性别、年龄和季节 MP-IgM 和 MP-DNA 检测阳性率不同，女性的检测阳性率均高于男性；1-3岁的 MP-IgM和7-12岁的 MP-DNA 阳性率分别高于其他年龄段；MP-IgM 检测阳性率以春秋季为高，而 MP-DNA 则以夏秋季为高，差异均有统计学意义（P ＜0.001）。②不同标本类型 MP-DNA 阳性率有所差异，以肺泡灌洗液的阳性检出率最高，为49.95％。③MP-IgM 和 MP-DNA 阳性一致性与年龄有关，以4-6岁和7-12岁符合率较高，分别为35.2％和45.8％。结论①儿童肺炎支原体感染发病人群以学龄前和学龄期儿童为主，女性多于男性，秋季高发。②肺泡灌洗液是 MP-DNA 检测最佳标本类型。③＜1岁和1-3岁宜采用 MP-DNA 和 MP-IgM 联合检测提高诊断率。

Objective To analyze the results of distribution of mycoplasma pneumoniae IgM antibody and DNA test,and ex-plore its application in diagnosis of Mycoplasma pneumoniae infection in children.Methods Retrospectively analysed myco-plasma pneumoniae antibody IgM （MP-IgM）and mycoplasma pneumoniae DNA （MP-DNA）results,114 374 passengers and 8 014 passengers,in 0 - 16 year-old children of Shengjing Hospital Affiliated to China Medical University from year 2013 to 2014.Analyzed of the relationship between gender,age,season and the positive rate of the MP-IgM and MP-DNA. Collected 5 106 patients with MP-IgM and MP-DNA results simultaneously and analyze the consistency between two posi-tive indexes in different ages.Results ①MP-IgM and MP-DNA positive rate varied in sex,age and season,the positive rate in female was higher than male.The positive rates of MP-IgM and MP-DNA at the age of 1-3 and 7- 12 years old were higher than other age groups.The positive rate of MP-IgM in spring and autumn was higher,while MP-DNA was higher in summer and autumn and all differences were statistically significant （P 〈 0.001）.②The positive rate of MP-DNA differed in specimens,the bronchoalveolar lavage fluid had the highest MP-DNA positive rate,49.95%.③The positive consistency of MP-IgM and MP-DNA was associated with age,with 4-6 and 7-12 year-olds the highest,respectively 35.2% and 45.8%. Conclusion ①Incidence of children pneumonia mycoplasma infection was mainly in preschool and school-aged children,more female than male,and autumn highest.② The detection of MP-DNA in bronchoalveolar lavage fluid was the best sample type.③For 〈1 and 1-3 year-olds,combined detection of MP-DNA and MP-IgM can improve diagnostic rates.