摘要
目的了解重症监护病房(ICU)老年患者感染产超广谱β-内酰胺酶(ESBLs)肺炎克雷伯菌整合子基因的分布及耐药率,为临床合理使用抗菌药物提供依据。方法采用法国生物梅里埃公司生产的VITEK-2微生物自动鉴定系统,对2013年1月至2015年12月老年ICU患者的各类临床标本进行细菌鉴定和药敏试验,产ESBLs肺炎克雷伯菌167株用PCR分析整合子基因,并通过测序明确基因。结果肺炎克雷伯菌386株中产ESBLs检出率为43.26%;整合子检出阳性率50.89%,检出全为Ⅰ类整合子;整合子可变区扩增出aadA2、aadA1、aada16、dfra27和arr-3基因;产ESBLs整合子基因阳性株耐药率明显高于整合子基因阴性菌株。结论老年ICU患者感染产ESBLs肺炎克雷伯菌和整合子基因密切相关,在细菌的耐药上整合子起着重要作用。
Objective To understand the gene distribution and drug resistance rate of integron gene of extended spectrumβ‐lac‐tamases（ESBLs） producing Klebsiella pneumonia infection in ICU elderly patients in order to provide the basis for rational use of antimicrobial agents .Methods The BioMerieux VITEK‐2 Automated Microbes Identification System was adopted to conduct the bacteria identification and drug susceptibility test on various clinical specimens of ICU elderly patients in our hospital from January 2013 to December 2015 .The integron gene in 167 strains of ESBLs‐producing Klebsiella pneumoniae was analyzed by PCR ,and the gene was identified by sequencing .Results Among 386 strains of Klebsiella pneumoniae ,the detection rate of ESBLs‐producing strains was 43 .26% ;the positive rate of integron was 50 .89% ,the detected integron was class Ⅰ integron;aadA2 ,aadA1 ,aada16 , dfra27 and arr‐3 genes were amplified from integron variable region;the drug resistance rate of ESBLs‐producing integron gene pos‐itive strains was significantly higher than that of integron gene negative strains .Conclusion the ICU elderly patients with ESBLs‐producing Klebsiella pneumoniae infection is closely related to the integron gene and integron plays an important role in bacterial drug resistance .
出处
《国际检验医学杂志》
CAS
2016年第16期2214-2216,共3页
International Journal of Laboratory Medicine
基金
湖南省科技计划项目(2013FJ3115)
