抗生素对肺炎克雷伯菌生物膜的杀灭作用研究

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[目的]研究抗生素对肺炎克雷伯菌生物膜内细菌的杀灭作用。[方法]用高分子滤膜琼脂培养法制备生物膜,采用肉汤培养法检测庆大霉素、环丙沙星、氧氟沙星单独应用与庆大霉素+环丙沙星、庆大霉素+氧氟沙星联合应用对生物膜内细菌的影响。[结果]单独应用的三种抗生素对生物膜作用8h后残余菌量分别为初始菌量的76.0%、75.0%和80.0%;两组联合应用的抗生素同样处理生物膜后残余菌量分别为6.5%和9.0%。[结论]庆大霉素十环丙沙星与庆大霉素+氧氟沙星联合应用,能显著增强对肺炎克雷伯菌生物膜内细菌的杀灭。
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