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应用ROC曲线评价耐甲氧西林葡萄球菌的检测方法
6页1、应用ROC曲线评价耐甲氧西林葡萄球菌的检测方法摘nbsp;要nbsp;目的:nbsp;nbsp;通过对耐甲氧西林葡萄球菌(MRS的常用检测方法及实验条件进行评价,选择特异性和敏感性较 nbsp;nbsp;好的方法和理想的实验条件。方法:nbsp;nbsp;以PCR法检测葡萄球 菌的mecA基因为“金标准王震,周丽萍, 刘智成,庄建伟,汪海青 摘 要 目 的:通过对耐甲氧西林葡萄球菌(MR$的常用检测方法及实验条件进行评价,选择特异性和敏感性较好的方法和理想的实验条件。方法: 以PCF法检测葡萄球菌的mecA基因为“金标准”,比较PBP2a交乳凝集试验法、头抱 西丁( FOX琼脂筛选法、苯唑西林(OXA琼脂稀释法(MIC)、FOX纸片扩散 法、OXA琼脂筛选法、OXA纸片扩散法检测MRS勺敏感性和特异性。同时应用 ROC曲线对实验方法及不同的实验条件进行评价。结果:PCR法共检出79株mecA基因阳性菌株,阳性率为73.8%。以PCR法为“金标准”,上述6种 方法的 ROC曲线下面积分别为0.994,0.964,0.955,0.946,0.932,0.862。结论: 选择最佳实验条件,用
2、两种表型检测方法作平行检测,对可疑 结果用PBP2a交乳凝集试验或PCR法确诊。关键词 耐甲氧西林葡萄球菌 ; 药敏实验 ; 评价Application of ROC curve in theevaluation of the methods for detectionof methicillin-resistantstrains of staphylococciWANG Zhe,n ZHOU Li-ping , LIUZhi-cheng , ZHUANG Jian-wei, WANG Hai-qing(1.Department ofClinical Laboratory , the Second People s Hospital of Zhenjiang,Zhenjiang Jiangsu 212002;2. Department of Molecular Biol-ogy,School of Medical Technology , Jiangsu University, Zhenjiang Jiangsu212001;3. Department Nosocomial Infec
3、tion Control, theSecondPeople s Hospital of Zhenjiang, Zhenjiang Jiangsu212002, China )Abstract Objective: To evaluate of sixtests for detection of methicillin-esistant strains of staphylococci. Then choosed the better methods and conditions for clinical experiment. Methods: To compare the sen-sitivity and thespecificity of the PBP2a latex agglutination method, efoxitin agarscreening method , oxacillinagar dilution method( MIC),cefoxitin disk diffusion method, oxacillin agar screening test andox
4、acillin diskdiffusion method for detecting of MRS using PCRamplification mecA gene as “ gold standard ” . Receiver op - erating characteristic( ROC) curve was drawn , and the area under the curvewas calculated. Results: Therewere 79 isolates showing mecA-positive among 107 staphylococcal isolates by PCR, the rate was73.8%. The area under ROC curve of the six methods was 0.994,0.964, 0.955, 0.946, 0.932, 0.862 respectively.Conclusion: Foradvancing the sensitivity and the specificity, two methods
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