目的 逐年分析金黄色葡萄球菌对万古霉素、替考拉宁及利奈唑胺的MIC值变化,评估是否存在万古霉素MIC漂移.方法 收集我院2007-2009年临床分离的金黄色葡萄球菌菌株,头孢西丁纸片法确认MRSA,琼脂稀释法测定MRSA与MSSA菌株对万古霉素、替考拉宁、利奈唑胺及头孢西丁的最低抑菌浓度(MIC),计算MIC50,MIC90,MIC几何均值,敏感率及耐药率.结果 共收集金黄色葡萄球菌菌株184株,这3年的MRSA检出率分别为38.8%、46.7%和53.3%,呈逐年增高的趋势(P0.05).替考拉宁对MRSA菌株几何均值为0.747、0.714和0.971μg/mL,无渐进性上升趋势(P>0.05).MRSA对万古霉素的MIC几何均值高于MSSA组,差异具有统计学意义(P0.05). There was a significant difference of MIC between MRSA strains and MSSA strains (P<0.01). Conclusion VISA or VRSA are not found in the strains, however, vancomycin MIC increased over time. The strains with vancomycin MICs of ≥1μg/Ml increasd yearly, and MIC creeping existed in the study period.
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