莫西沙星对耐药葡萄球菌生物膜体外药效学研究  

Activity of Moxifloxacin against Resistant Staphylococcus Biofilms in Vitro

作　　者：姜剑伟[1] 陈向东[1] 汪辉[1] 李魁[1] 范璐[1] 王素霞[1] 

机构地区：[1]中国药科大学生命科学与技术学院微生物教研室,南京210009

出　　处：《药学与临床研究》2015年第4期347-350,共4页Pharmaceutical and Clinical Research

摘　　要：目的 研究莫西沙星对4 株临床耐药葡萄球菌生物膜的体外药效学.方法：采用微量肉汤稀释法测定莫西沙星的最低抑菌浓度（minimal inhibitory concentration,MIC ）、最低抑制生物膜浓度（ minimal biofilm inhibitory concentration,MBIC） 和最低摧毁生物膜浓度（minimalbiofilm eradication concentration,MBEC ） ; 测定莫西沙星对细菌生物膜形成量以及存活菌的影响;采用微量稀释棋盘法测定莫西沙星与局部用药瑞他帕林的联合抗生物膜效果.结果：莫西沙星在的范围内可完全摧毁细菌生物膜; 2XMIC显著降低生物膜的形成量;100XMIC可显著降低生物膜存活菌数;与瑞他帕林的联合抗生物膜分数（fractional biofilm inhibitoryconcentration, FBIC ）均小于1.0.结论：莫西沙星对4 株耐药葡萄球菌生物膜具有抑制和摧毁作用,而且与局部用药瑞他帕林具有协同作用.Objective: To investigate the antibacterial effect of moxifloxacin against four strains of clinical resistant Staphylococcus biofilms in vitro. Methods: MIC (minimal inhibitory concentrations), MBIC (minimal biofilm inhibitory concentration) and MBEC (minimal biofilm eradication concentration) were examined by microdilution in broth; the percentages of biofilms formed and the viable cells of biofilms were investigated; and the synergy effects against biofilms were evaluated by a microdilution checkerboard method. Results: Moxifloxacin can eradicat biofilms at the concentration of 16-256 mg·L-1; The biofilms formed significantly decreased when moxifloxacin was at 2×MIC; moxifloxacin at 100×MIC caused significant decrease in viable cells of biofilms; the fractional biofilm inhibitory concentrations (FBICs) of moxifloxacin in combination with topical antibiotic retapamulin were all less than 1.0. Conclusions: Moxifloxacin can inhibit and eradicate clinical resistant Staphylococcus biofilms in vitro; synergy was demonstrated for moxifloxacin in combination with topical antibiotic retapamulin against them.

关 键 词：莫西沙星 生物膜 耐药葡萄球菌 瑞他帕林 

分 类 号：R915[医药卫生—微生物与生化药学]