检验医学 ›› 2015, Vol. 30 ›› Issue (6): 613-616.DOI: 10.3969/j.issn.1673-8640.2015.06.017

• 基础研究·论著 • 上一篇    下一篇

铜绿假单胞菌16S rRNA甲基化酶基因和氨基糖苷修饰酶基因的研究

彭敬红1, 侯彦强1, 谢多双2, 刘军1, 郑蓉3   

  1. 1. 上海交通大学附属第一人民医院松江分院检验科,上海 201600
    2. 湖北医药学院附属太和医院院感科,湖北 十堰 442000
    3. 湖北医药学院附属太和医院妇科,湖北 十堰 442000
  • 收稿日期:2014-08-07 出版日期:2015-06-30 发布日期:2015-07-03
  • 作者简介:null

    作者简介:彭敬红,女,1968年生,博士,副主任技师,主要从事微生物检验和细菌耐药机制研究。

    通讯作者:郑 蓉,联系电话:0719-8801880。

  • 基金资助:
    湖北省教育厅重点课题资助项目(D20112106);上海市松江区科学技术攻关项目(13SJGGYY17)

Studies of 16S rRNA methylase gene and aminoglycoside modifying enzyme gene in Pseudomonas aeruginosa

PENG Jinghong1, HOU Yanqiang1, XIE Duoshuang2, LIU Jun1, ZHENG Rong3   

  1. 1. Department of Clinical Laboratory, Songjiang Branch, the First People's Hospital Affiliated to Shanghai Jiaotong University, Shanghai 201600, China
    2. Department of Nosocomial Infection Control, Taihe Hospital, Hubei University of Medicine, Hubei Shiyan 442000, China
    3. Department of Gynecology, Taihe Hospital, Hubei University of Medicine, Hubei Shiyan 442000, China
  • Received:2014-08-07 Online:2015-06-30 Published:2015-07-03

摘要: 目的

了解氨基糖苷类抗菌药物耐药的铜绿假单胞菌16S rRNA甲基化酶基因和氨基糖苷修饰酶基因的携带情况,探讨铜绿假单胞菌对氨基糖苷类药物的耐药机制。

方法

收集临床分离的氨基糖苷类抗菌药物耐药的铜绿假单胞菌35株,采用VITEK 2 Compact 全自动微生物分析系统进行鉴定及体外药物敏感性试验,聚合酶链反应(PCR)检测arm-Armt-Armt-Brmt-Crmt-D 5种16S rRNA甲基化酶基因和aac(3)-Ⅰaac(3)-Ⅱaac(6')-Ⅰbaac(6')-Ⅱant(3)-Ⅰant(2)-Ⅰ 6种氨基糖苷修饰酶基因。

结果

对氨基糖苷类药物耐药的铜绿假单胞菌同时对多种其他抗菌药物耐药,仅碳青霉烯类的亚胺培南耐药率较低,为5.7%。21 株检出rmt-B 16S rRNA甲基化酶基因,占60.0%;30株检出氨基糖苷修饰酶基因,占85.7%,其中28 株检出aac(3)-Ⅱ基因,占80.0%,18株检出ant(3)-Ⅰ基因,占51.4%,其余8种基因未检出。

结论

在铜绿假单胞菌对氨基糖苷类抗菌药物耐药的菌株中,检测出rmt-B 16S rRNA甲基化酶基因和aac(3)-Ⅱant(3)-Ⅰ氨基糖苷修饰酶基因,铜绿假单胞菌多重耐药现象严重。

关键词: 铜绿假单胞菌, 16S rRNA甲基化酶基因, 氨基糖苷修饰酶基因, 耐药性

Abstract: Objective

To investigate 16S rRNA methylase gene and aminoglycoside modifying enzyme gene in aminoglycoside-resistant clinical isolates of Pseudomonas aeruginosa, and to investigate the mechanism of drug resistance to aminoglycosides.

Methods

A total of 35 isolates of aminoglycoside-resistant clinical isolates of Pseudomonas aeruginosa were collected, and the identification and susceptibility testing in vitro were performed by VITEK 2 Compact automatic microbial analysis system. Five kinds of 16S rRNA methylase genes(arm-A, rmt-A, rmt-B, rmt-C and rmt-D) and 6 kinds of aminoglycoside modifying enzyme genes [aac(3)-Ⅰ, aac(3)-Ⅱ, aac (6')-Ⅰb, aac(6')-Ⅱ, ant (3)-Ⅰand ant (2)-Ⅰ] were detected by polymerase chain reaction (PCR).

Results

Aminoglycoside-resistant Pseudomonas aeruginosa showed being multi-drug resistant to a variety of antibiotics. Only the resistance rate to imipenem was low (5.7%). There were 21 isolates of Pseudomonas aeruginosa carried rmt-B 16S rRNA methylase gene, accounting for 60.0%, and 30 isolates of Pseudomonas aeruginosa carried aminoglycoside modifying enzyme genes, accounting for 85.7%, among them, 28 isolates carried aac(3)-Ⅱ aminoglycoside modifying enzyme genes, accounting for 80.0%, and 18 isolates carried ant (3)-Ⅰ aminoglycoside modifying enzyme genes, accounting for 51.4%. The other 8 isolates were not detected any genes.

Conclusions

Aminoglycoside-resistant isolates of Pseudomonas aeruginosa carry rmt-B 16S rRNA methylase gene and aac(3)-Ⅱ and ant (3)-Ⅰ aminoglycoside modifying enzyme genes. Furthermore, the multi-drug resistances of Pseudomonas aeruginosa are serious.

Key words: Pseudomonas aeruginosa, 16S rRNA methylase gene, Aminoglycoside modifying enzyme gene, Drug resistance

中图分类号: