Drug-susceptibility and Results Analysis of Clinical Isolated Escherichia coli / 中华医院感染学杂志

ABSTRACT

OBJECTIVE To explore the drug-resistant situation of clinical isolated Escherichia coli in our hospital from Jun to Dec in 2007,the aim is to offer evidence for drug-resistant monitoring and clinical antibiotics usage in our hospital. METHODS All clinical specimens isolated and cultured from patients were identified by using the automatic microorganism analyzer VITEK-2 as well as bacteria's drug susceptibility tests were performed using counterparts panel. RESULTS A total of 352 strains E. coli were isolated. The isolated ratio of extended spectram-?-lactamases (ESBLs) producing E. coli was 66.2% (233/352),no ESBLs producing E. coli was 33.8% (119/352). From them 111 strains E. coli were isolated in sputum and 89 strains were ESBLs producing and 22 strains were no ESBLs producing; 111 strains E. coli were isolated in urine and 62 strains were ESBLs producing and 49 strains were no ESBLs producing. The drug-resistance difference was obvious between them as well as between strains isolated from different sites. Better to select piperacillin/tazobactam,cefotetan,ertapenem,imipenem,amikacin,and nitrofurantoin to cure all isolated E. coli infection.CONCLUSIONS The drug-resistance of ESBLs producing E. coli is severe (66.2%) so that hospital administers should strengthen antibiotics usage management and improve antibiotics rational usage,inorder to decrease occurrance of bacterial resistance.