摘要
目的分析鲍曼不动杆菌碳青霉烯酶基因型,探讨其对碳青霉烯类抗生素耐药率升高的原因。方法收集2008年1月—2012年12月某院重症监护病房(ICU)320株碳青霉烯类抗生素耐药鲍曼不动杆菌。应用VITEK2全自动微生物分析仪进行菌株鉴定与药敏测定,聚合酶链反应(PCR)检测金属β内酰胺酶和OXA碳青霉烯酶基因。WHONET5.4统计软件:分析鲍曼不动杆菌耐药率变化。结果研究期间碳青霉烯类抗生素的耐药率显著增加,鲍曼不动杆菌对美罗培南的耐药率从10.8%升至80.4%,对亚胺培南的耐药率从13.5%升至83.5%。blaOXA-23及ISAba1相关blaOXA-23阳性率均从25.0%升至97.1%。未检测到blaOXA-24和金属β内酰胺酶基因。结论该院ICU鲍曼不动杆菌对碳青霉烯类抗生素的耐药率升高,可能与ISAba1相关blaOXA-23的扩散相关。
Objective To explore the causes of rising carbapenem resistance in Acinetobacter baumannii isolates by analysis of the carbapenemase genotypes in A .baumannii .Methods WHONET 5 .4 was used to analyze the changing resistance profile of A .baumannii isolates over years .A total of 320 carbapenem‐resistant A .baumannii isolates were collected from the patients in an intensive care unit from January 2008 to December 2012 .All strains were identified and tested by VITEK 2 for their susceptibility .The metallo‐β‐lactamases genes and OXA carbapenemase genes were investigated by polymerase chain reaction . Results The resistance rate of A .baumannii isolates to meropenem and imipenem increased rapidly from 10 .8% to 80 .4% and from 13 .5% to 83 .5% during the period from 2008 and 2012 .The prevalence of blaOXA‐23and ISAba1‐associated blaOXA‐23genes increased from 25 .0% to 97 .1% .No metallo‐β‐lactamase encoding genes were detected .Conclusions Our results indicate that the rising carbapenem resistance in the A . baumannii isolates in our intensive care unit may be associated with the high prevalence of blaOXA‐23 and IS A ba1‐associated blaOXA‐23 genes .
出处
《中国感染与化疗杂志》
CAS
CSCD
北大核心
2015年第3期253-256,共4页
Chinese Journal of Infection and Chemotherapy
基金
广州市教育局创新团队科研基金(B94117)-广州医院感染对策
关键词
细菌耐药
鲍曼不动杆菌
碳青霉烯酶
antimicrobial resistance
A cinetobacter baumannii
carbapenemase
作者简介
毛璞（1981-），女，博士，副研究员，主要从事医院感染控制与细菌耐药性研究。
通信作者：黎毅敏，E-mail：dryiminli@vip．163．com。
