检验医学 ›› 2015, Vol. 30 ›› Issue (7): 691-693.DOI: 10.3969/j.issn.1673-8640.2015.07.006

• 临床应用研究·论著 • 上一篇    下一篇

阴沟肠杆菌16S rRNA甲基化酶基因分布

唐翠连1, 王芳2, 陈芳军3, 张文斌4   

  1. 1.湖南邵阳医学高等专科学校附属医院,湖南 邵阳 422000
    2.湖南邵阳新宁县人民医院,湖南 邵阳 422000
    3.湖南邵阳武冈市人民医院,湖南 邵阳 422000
    4.湖南邵阳县人民医院,湖南 邵阳 422000
  • 收稿日期:2014-07-07 出版日期:2015-07-30 发布日期:2015-08-28
  • 作者简介:null

    作者简介:唐翠连,女,1978年生,学士,副主任技师,主要从事微生物学检验研究。

  • 基金资助:
    湖南省教育厅科研项目(12C1219);湖南邵阳市科技局科研项目(J1212)

Distribution of 16S rRNA methylase gene of Enterobacter cloacae

TANG Cuilian1, WANG Fang2, CHEN Fangjun3, ZHANG Wenbin4   

  1. 1. The Affiliated Hospital of Shaoyang Medical College, Hunan Shaoyang 422000, China
    2. The People's Hospital of Xinning County, Hunan Shaoyang 422000, China
    3. The People's Hospital of Wugang, Hunan Shaoyang 422000, China
    4. The People's Hospital of Shaoyang County, Hunan Shaoyang 422000, China
  • Received:2014-07-07 Online:2015-07-30 Published:2015-08-28

摘要: 目的

了解湖南邵阳地区耐氨基糖苷类抗菌药物的阴沟肠杆菌中16S rRNA甲基化酶基因分布特点及其与氨基糖苷类抗菌药物耐药性的关系。

方法

收集2012年8月至2014年5月邵阳地区新宁县人民医院、武岗市人民医院、邵阳县人民医院和邵阳医学高等专科学校附属医院临床样本中分离的241株阴沟肠杆菌,采用API20E进行菌种鉴定,同时用纸片扩散法进行体外药物敏感性试验。采用聚合酶链反应(PCR)进行armAnpmArmtArmtBrmtCrmtD基因检测,分析耐药基因与耐药表型的关系。

结果

241株阴沟肠杆菌中200株对阿米卡星、庆大霉素、妥布霉素和奈替米星4种氨基糖苷类抗菌药物耐药,其耐药率分别为41.9%、68.5%、70.1%和63.5%。基因检测结果提示,241株阴沟肠杆菌检出2种16S rRNA甲基化酶基因,分别为armA(96株,39.8%)和rmtB(17株,7.1%),未检出npmArmtArmtCrmtD基因。

结论

16S rRNA甲基化酶与氨基糖苷类抗菌药物的耐药性有相关性。不同地区分离的对氨基糖苷类药物耐药的阴沟肠杆菌菌株携带16S rRNA甲基化酶的基因型有一定差异,湖南邵阳地区阴沟肠杆菌以携带armA基因为主。

关键词: 阴沟肠杆菌, 16S rRNA甲基化酶, 耐药性

Abstract: Objective

To know the distribution characteristics of 16S rRNA methylase gene of Enterobacter cloacae being resistant to aminoglycoside antibiotics and the relationship between 16S rRNA methylase gene and aminoglycoside drug resistance in Shaoyang, Hunan.

Methods

A total of 241 isolates of Enterobacter cloacae were collected from the Affiliated Hospital of Shaoyang Medical College, the People's Hospital of Xinning County, the People's Hospital of Wugang and the People's Hospital of Shaoyang County from August 2012 to May 2014, and were identified by API20E. The drug sensitivity test in vitro was performed by K-B method. The armA, npmA, rmtA, rmtB, rmtC and rmtD genes were determined by polymerase chain reaction (PCR). The relation between drug resistant gene and resistant phenotypes was analyzed.

Results

In the 241 isolates of Enterobacter cloacae, 200 isolotes of them were resistant to aminoglycoside antibiotics, including 41.9% isolates being resistant to amikacin, 68.5% to gentamicin, 70.1% to tobramycin, and 63.5% to netilmicin. Two kinds of 16S rRNA methylase genes were detected, among which were armA (96 isolates, 39.8%) and rmtB (17 isolates, 7.1%), and no npmA, rmtA, rmtC and rmtD genes were detected.

Conclusions

16S rRNA methylase is closely related with the drug resistance of aminoglycoside antibiotics. Genotypes carried by 16S rRNA methylases are somewhat different in bacterial isolates from different areas, and armA is a main kind of 16S rRNA methylase gene in Shaoyang.

Key words: Enterobacter cloacae, 16S rRNA methylase, Drug resistance

中图分类号: