目的观察黄芩苷对产 NDM-1大肠埃希菌的体内外抗菌作用。方法肉汤稀释法测定黄芩苷的最小抑菌浓度（MIC）、最小杀菌浓度（MBC）；棋盘联合药敏试验检测黄芩苷与亚胺培南的协同作用；通过小鼠菌血症模型，观察黄芩苷对感染模型的保护作用。结果黄芩苷的最小抑菌浓度和最小杀菌浓度相同，均为8 mg／ml；黄芩苷与亚胺培南呈明显的协同作用（FIC＝0.125），单独使用黄芩苷使菌血症小鼠死亡率降低25％。结论黄芩苷体内、外均具有一定的抗产 NDM-1大肠埃希菌活性。%Objective To examine the bacteriostasis of baicalin against Escherichiacoli strain carrying NDM-1 gene.Methods Minimal inhibitory concentration(MIC)and minimal bactericidal concentration(MBC)were determined by broth dilution method.Synergy function was designed withcheckerboard method.Anti-infection effect in vivo of baicalin was observed in mice with bacteremia.Results In vitro antibacterial tests showed that the MIC and MBC baicalin were 8 mg/ml.Synergistic inhibitory effect was observed between baicalin and imipenem (FIC=0.125).In vivo inhibition experiments showed that ba-icalin had decreased the mortality of 25% of Escherichiacoli Strain carrying NDM-1 gene infection in mice.Conclusion Ba-icalin has antibacterial effect on NDM-1 E.coli.
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