【摘要】 【目的】通过对按不同比例配伍的紫花地丁和蒲公英体外抗菌活性的对比分析,探讨两药合用的最佳比例以及影响因素。【方法】采用琼脂二倍稀释法测定药物的最低抑菌浓度(MIC),采用肉汤稀释法测定药物的最低杀菌浓度(MBC),并绘制杀菌曲线;分析次抑菌浓度药物诱导细菌耐药情况,观察对各组药物体外抗菌活性影响的因素。【结果】紫花地丁和蒲公英按照质量比1∶4的比例配伍,对4种革兰氏阳性球菌和4种革兰氏阴性杆菌均有较好的抑菌作用,且对大肠埃希氏菌和克雷伯氏菌表现出一定的杀菌作用(50%ρMB/50%ρMI和90%ρMB/90%ρMI均为2);绘制的杀菌曲线表明,各组药物对不同菌株的杀菌作用均未呈现典型的杀菌曲线,但与对照组比较,均显现一定的抑菌趋势。细菌接种量、血清量以及pH值的变化对各组配伍药物的体外抗菌作用无明显影响。【结论】紫花地丁和蒲公英按照质量比1∶4配伍使用时体外抗菌活性较强。更多还原

【Abstract】 【Objective】In-vitro antibacterial activity of the combination of Herba Violae（HV）and Herba Taraxaci（HT）in different proportions was compared and analyzed for the optimization of the combination proportion of Herba Violae and Herba Taraxaci and the influencing factors.【Methods】The minimum inhibitory concentration（MIC）of the combination of HV and HT was determined by agar double dilution method and the minimum bactericidal concentration（MBC）by broth dilution method,and bactericidal curve was traced.Meanwhile,the resistance of the combination of HV and HT induced by sub-inhibitory concentration was analyzed,and the influencing factors of in-vitro antibacterial activity were investigated.【Results】The combination of HV and HT in the proportion of 1∶4 had a better antibacterial activity on four kinds of gram-positive bacteria and on four kinds of gramnegative bacteria,and exerted an bactericidal effect on Escherichia coli and Klebsiella Pneumoniae(both MBC₅₀/MIC₅₀ and MBC₉₀/MIC₉₀ being 2).The bactericidal curve showed that 2?Log cfu/mL bacteria strain could be killed by the combination of the proportion being 1∶4 at 8^th hour,the effect being superior to that of other two combinations.Inoculation dosage,serum amount and pH value had no effect on in-vitro antibacterial activity.【Conclusion】The combination of HV and HT in the proportion of 1∶4 has a better antibacterial activity.更多还原