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【目的】探讨救必应水提取物与抗菌药联合诱导细菌传代的体外抑菌活性,为救必应的综合开发利用提供参考依据。【方法】采用96孔反应板二倍微量稀释法体外检测救必应水提取物与抗菌药的最小抑菌浓度(MIC),并以1/2 MIC的救必应水提取物与抗菌药联合诱导产超广谱β-内酰胺酶(Extended spectrum beta-lactamases,ESBLs)细菌传代,然后用微量棋盘稀释法测定救必应水提取物与抗菌药联合作用后的部分抑菌浓度指数(FICI)。【结果】救必应水提取物的MIC为1.0 g/mL,以0.5g/mL的救必应水提取物与阿莫西林、左氧氟沙星、克林沙星、磺胺间甲氧嘧啶、加替沙星、头孢噻呋钠6种抗菌药联合诱导产ESBLs细菌传代后MIC显著降低,联用后的FICI分别为0.375、0.750、0.750、0.515、0.750和0.750。【结论】救必应水提取物可明显增强抗菌药对产ESBLs细菌的抗菌活性,且呈协同或相加作用。 相似文献
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“救必应”为冬青科植物铁冬青的树皮或根皮水浸出物制备,具有广谱的抗菌作用.为研究中药“救必应”对产超广谱β-内酰胺酶(ESBLs)大肠杆菌耐药性的影响,本研究将产ESBLs的E.coli在亚抑菌浓度的中药“救必应”中传代,采用微量稀释法测定抗生素对产ESBLs的E.coli最小抑菌浓度(MIC),并通过透射电镜观察中药作用后细菌形态学变化.结果显示,中药“救必应”可以显著降低产ESBLs的E.coli对阿莫西林、加替沙星、诺氟沙星、盐酸左旋氧氟沙星、乙酰甲喹、磺胺间甲氧嘧啶钠、克林沙星、氟苯尼考的MIC值,并且MIC均降低4倍;此外,中药作用后可以引起细菌细胞壁的皱裂、干瘪、折叠、缩短等形态变化. 相似文献
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This paper researched antibacterial effect of different Bidens bipinnata L extracts against clinical ESBLs E.coli by means of micro-dilution assay and the present method of combining traditional Chinese herbs with western medicine in vitro. The results showed that it had good inhibitory effect under Bidens bipinnata L decoction, ethyl acetate extracts, acetone extracts and trichloromethane extracts in combination with antibiotic. And ethyl acetate extracts was the most efficient. Bidens bipinnata L decoction was the most widespread, and could reduce the MIC of different antibiotics. 相似文献
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本试验主要探讨救必应中药血清与抗菌药联合诱导细菌传代的体外抑菌活性。制备救必应中药血清,采用二倍微量稀释法体外检测抗菌药的最小抑菌浓度(MIC),然后救必应中药血清与抗菌药联合诱导产超广谱β-内酰胺酶(extended spectrumβ-lactamases,ESBLs)细菌传代。救必应中药血清与抗菌药联合诱导细菌传代对耐药大肠杆菌有不同程度的抑菌活性。救必应中药血清可明显地增强β-内酰胺类抗菌药、氨基糖苷类抗菌药、喹诺酮类抗菌药和卡巴氧类抗菌药对耐药菌的抑制作用。 相似文献
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