吉林大学学报(医学版)

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长春地区部分医院革兰阴性杆菌16S rRNA甲基化酶基因的检测及其意义

周佳琦1,史红艳1,徐花1,黄金凤2,孙延波1   

  1. 1. 吉林大学白求恩医学院病原生物学系,吉林 长春 130021;2.辽宁省大连市科兴疫苗技术有限公司,辽宁 大连 116620
  • 收稿日期:2013-04-12 出版日期:2013-09-28 发布日期:2013-12-13
  • 通讯作者: 孙延波(Tel: 0431-85619574,E-mail: sunyb@jlu.edu.cn) E-mail:sunyb@jlu.edu.cn
  • 作者简介:周佳琦(1989-),女,吉林省东丰县人,在读理学硕士,主要从事细菌耐药分子机制研究。
  • 基金资助:

    吉林省发改委省校合作技术开发项目资助课题(3R2097783426)

Detection of 16S rRNA methylase genes in gram-negative bacilli isolated from hospitals in Changchun area and its significance

ZHOU Jia-qi1,SHI Hong-yan1,XU Hua1,HUANG Jin-feng2,SUN Yan-bo1   

  1. 1.Department of Pathogenobiology,Norman Bethune College of Medicine,Jilin University,Changchun 130021,China;2.Corporation of KeXing Vaccine Technology,Dalian 116000,China
  • Received:2013-04-12 Online:2013-09-28 Published:2013-12-13

摘要:

摘 要] 目的:分析长春地区部分医院革兰阴性杆菌16S rRNA甲基化酶基因的分布和类型,为氨基糖苷类抗生素的合理应用提供依据。方法:采用琼脂稀释法筛选出阿米卡星与庆大霉素的耐药株,通过聚合酶链式反应(PCR)扩增耐药菌株所携带的16S rRNA甲基化酶基因及其类型(armA、rmtB、rmtA、rmtC、rmtD和npmA),利用基因测序比对扩增基因序列并确定16S rRNA甲基化酶基因类型。结果:116株革兰阴性杆菌对阿米卡星和庆大霉素的耐药率分别为42.2% 和75.0%,其中50株革兰阴性杆菌呈16S rRNA甲基化酶基因阳性(43.1% ,50/116),其主要类型为 armA和rmtB(检出率分别为12.1% 和31.0%),而rmtA、rmtC、rmtD和npmA的检出率均为0。结论:长春地区革兰阴性杆菌16S rRNA甲基化酶基因主要以armA和rmtB 2种类型存在,是其导致氨基糖苷类抗生素高水平耐药的原因之一。

关键词: 革兰阴性杆菌, 16S rRNA甲基化酶, 耐药性

Abstract:

Abstract:Objective To analyze the distribution and genotypes of 16S rRNA methylase genes in gram-negative bacilli isolated from hospitals in Changchun area and to provide a reasonable basis for the application of aminoglycosides. Methods  Amikacin-resistant and gentamicin-resistant strains were screened using agar dilution tests,and 16S rRNA methylase genes in gram-negative bacilli isolates were amplified by PCR and genotypes of 16S rRNA methylases (armA,rmtB,rmtA,rmtC,rmtD and npmA) were analyzed using gene sequencing.Results The resistant rates of 116 clinical isolates of gram-negative bacilli to amikacin and gentamicin were 42.2% and 75.0%,respectively. Fifty of 116 isolates were positive for 16S rRNA methylase genes(43.1%,50/116). The common genotypes of 16S rRNA methylase were armA and rmtB (12.1% and 31.0%);however,the rmtA,rmtC,rmtD and npmA genes were not found.Conclusion The genotypes of 16S rRNA methylase in gram-negative bacilli in Changchun area are armA and rmtB which  is one of the reasons to induce high resistance to aminoglycosides.

Key words: gram-negative bacilli, 16S rRNA methylase, antibiotic-resistance

中图分类号: 

  • R378