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惠东地区肠杆菌科细菌中超广谱β-内酰胺酶和外膜蛋白的研究

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摘要 目的:分析惠东地区肠杆菌科细菌中超广谱β-内酰胺酶类型及外膜蛋白缺失情况。方法:收集2013年1月至2013年12月期间惠东地区各医院,各科室血、尿、痰、大便、穿刺液、分泌物、胆汁等样本中分离培养的菌株,依据2010年版CLSI文件M100-S20判断依据确证阳性菌株246株。本研究采用荧光定量PCR反应检测细菌基因型,采用琼脂稀释法及E-tesr法测定MIC值,对部分耐药现象异常的菌株采用SDS-PAGE凝胶电泳研究外膜蛋白结构。结果:共有270株肠杆菌科细菌检测出β-内酰胺酶,检出率为95.74%。在大肠埃希菌与变异杆菌中,CTX-M-9组基因检出率明显高于CTX-M-1组基因(P<0.01),在肺炎克雷伯菌中CTX-M-1组基因检出率明显高于CTX-M-9组基因(P<0.01)。282株产ESBLs的菌株对头孢唑啉、头孢噻肟、头孢曲松株均呈耐药性。然而93.33%、95.56%的奇异变形杆菌对头孢他啶及氨曲南敏感。提取对头孢唑啉、头孢噻肟、头孢曲松株耐药,却对氨曲南十分敏感的菌株的外膜蛋白进行SDS-PAGE电泳,未发现明显的结构缺失。结论:在惠东地区,肠杆菌科细菌普遍能够产生ESBLs,故临床进行治疗时应根据细菌种类及基因型确定治疗方案。
出处 《深圳中西医结合杂志》 2014年第6期3-5,共3页 Shenzhen Journal of Integrated Traditional Chinese and Western Medicine
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