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PA试验与实时PCR检测肺炎支原体感染的对比研究
Authors
Publication date
1 January 2008
Publisher
Editorial Office of Journal of Sun Yat-sen University
Abstract
【目的】 观察颗粒凝集试验(PA)与实时PCR检测肺炎支原体(MP)感染患儿的阳性率,在不同年龄?病程7 d前后?用药后检出率是否有差异,探讨MP感染的早期?有效的诊断方法?【方法】 选取2007年10月-2007年12月在广东省妇幼保健院儿科病房住院治疗的呼吸道感染患儿290例,根据年龄将患儿分为4组:婴儿组(≤ 1岁),幼儿组(1 ~ 3岁),学龄前组(3 ~ 6岁),学龄组(> 6岁),分别于入院时留取血清及呼吸道分泌物标本(痰液或鼻咽灌洗液),血清行PA试验检测MP抗体,呼吸道分泌物行实时PCR检测MP*9鄄DNA,病程小于7 d者待病程超过7 d后第2次留取血清及呼吸道分泌物标本进行检测,对确诊MP感染患儿治疗后再复查血清及呼吸道分泌物,比较两种检测方法在不同年龄?病程7 d前后?用药后对MP感染检出率的差异? 【结果】 PA试验检测 MP抗体总阳性率为12.8%,各年龄组阳性率分别为3.3% ?13.5%?23.3%和36.8%,阳性率随年龄增长呈上升趋势,组间差异有统计学意义(P 0.05);其检测出MP*9鄄DNA阳性率在小婴儿不低?MP抗体检测受病程长短影响,病程长,阳性率高,实时PCR不受病程长短影响?确诊病例予阿奇霉素治疗3 d后复查,MP抗体阳性率无明显变化,PCR检测MP*9鄄DNA阳性率降低?【结论】 血清学PA试验标本采集简便,不受用药影响,但受患儿年龄?病程长短影响;实时PCR不受患儿年龄?病程长短影响,但受用药影响;PA试验与实时PCR联合应用,可提高MP早期检出率,更好指导临床治疗
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