我院产ESBLs大肠埃希菌和肺炎克雷伯菌的耐药性分析

目的：了解我院产ESBLs大肠埃希菌和肺炎克雷伯菌的分布及耐药情况，指导临床合理用药。方法：对我院2005年7月～2007年12月的临床标本分离的大肠埃希菌218株，肺炎克雷伯菌195株，采用纸片扩散表型确证试验进行ESBLs检测，用K—B法做药敏试验。结果：在413株菌中共检出产ESBLs菌株106株，总检出率为25．7％；产ESBLs细菌对所有青霉素类抗生素产生耐药，对三代头孢类抗生素耐药率也达到90％以上，对磺胺类、喹诺酮类耐药率为50％～90％，对亚胺培南均敏感。结论：产ESBLs的大肠埃希菌和肺炎克雷伯菌逐年上升，应根据药敏结果结合临床合理使用抗生素。

Antibiotic restistance analysis of extended-spectrum β-lactamases-producing Klebsiella pneumoniae and Escherichia coli in hospital

Objective： To study the distribution and characteristic about antibiotic resistance of extended-spectrum β-lactamases （ESBLs） producing Klebsiella pneumoniae and Escherichia coli for guiding the clinical drug using. Methods： 218 isolates of E. coli and 195 isolates of K. pneumoniae strains were collected from July 2005 to December 2007. ESBLs-producing isolates were detected by inhibitor-potentiated,,disc diffusion test. The bacterial susceptibility testing was done by K-B argr diffusion method. Results： Among 413 E. coli and K. pneumoniae isolates, 106 were ESBLs-producing strains, the ratio was 25.7%. All of the ESBLs producing strain were resistant to penicillins,the resistant rate of 3rd cephalosporin were above 90%,the resisitant ratd of sulfonamides and quinolones were 50%-90%,all isolates were susceptble to imipenem.Conclusion：The prevalence of ESBLs-producing E. coli and K. pneumoniae seems increasing, it is very important to use antibiotics reasonably and adopt effcitive measure in clinical.