为了解大肠埃希菌对临床常用抗生素耐药性的发生频率和监测耐药性的发展状况 ,正确选用和合理使用抗生素 ,我科选用了 15种常用抗生素进行耐药分析。现报道如下 :1　材料与方法1 1　材料 :随机选用 1999年 1月至 12月本科从血液、尿液、脓液、各种分泌物中分离出 40株大肠埃希 In order to understand the frequency of clinical antibiotic resistance in Escherichia coli and to monitor the development of drug resistance, the correct selection and rational use of antibiotics, our department used 15 commonly used antibiotics for drug resistance analysis. Are reported as follows: 1 Materials and Methods 1 1 Materials: Random selection January 1999 to December undergraduate from the blood, urine, pus, a variety of secretions isolated 40 strains of Escherichia coli