检验医学 ›› 2015, Vol. 30 ›› Issue (2): 122-127.DOI: 10.3969/j.issn.1673-8640.2015.02.005

• 质谱技术在临床微生物检验中的应用专题 • 上一篇    下一篇

MicroflexTM MALDI-TOF MS和Vitek 2 Compact全自动微生物分析系统对肠杆菌科细菌鉴定能力的比较

刘瑛, 俞静, 陈峰, 刘婧娴, 李媛睿, 皇甫昱婵, 沈立松   

  1. 上海交通大学医学院附属新华医院检验科,上海 200092
  • 收稿日期:2014-10-20 出版日期:2015-02-28 发布日期:2015-02-12
  • 作者简介:null

    作者简介:刘瑛,女,1965年生,硕士,主任技师,主要从事细菌耐药机制与医院感染分子流行病学研究。

    通讯作者:沈立松,联系电话:021-25077070。

Comparison on the identification abilities of MicroflexTM MALDI-TOF MS and Vitek 2 Compact automatic microbial analysis system for Enterobacteriaceae

LIU Ying, YU Jing, CHENG Feng, LIU Jingxian, LI Yuanrui, HUANGFU Yuchan, SHEN Lisong   

  1. Department of Clinical Laboratory,Xinhua Hospital,Shanghai Jiaotong University School of Medicine,Shanghai 200092,China
  • Received:2014-10-20 Online:2015-02-28 Published:2015-02-12

摘要: 目的

比较MicroflexTM基质辅助激光解吸电离飞行时间质谱(MALDI-TOF MS)和Vitek 2 Compact全自动微生物分析系统(简称Vitek 2 Compact)对肠杆菌科细菌的鉴定能力。

方法

采用MicroflexTM MALDI-TOF MS 和Vitek 2 Compact同时对545株肠杆菌科质控菌株和临床分离菌株进行鉴定,鉴定结果不一致者采用沙门菌血清凝集试验或细菌16S rDNA基因测序予以确证。

结果

MicroflexTM MALDI-TOF MS对545株细菌的种和属的鉴定率分别为97.1%、2.9%。Vitek 2 Compact对545株细菌的种、群、属的鉴定率分别为83.3%、13.9%和2.2%,鉴定错误率为0.2%,未鉴定率为0.4%。

结论

MicroflexTM MALDI-TOF MS对肠杆菌科细菌的鉴定符合率高于Vitek 2 Compact,且操作快速、简便,成本低,可用于临床肠杆菌科细菌的常规快速鉴定。

关键词: 基质辅助激光解吸电离飞行时间质谱, 肠杆菌科细菌, 鉴定

Abstract: Objective

To compare the identification abilities of MicroflexTM matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF MS) and Vitek 2 Compact automatic microbial analysis system (Vitek 2 Compact) for Enterobacteriaceae.

Methods

A total of 545 isolates of Enterobacteriaceae from a variety of clinical and quality control isolates were identified by MicroflexTM MALDI-TOF MS and Vitek 2 Compact. The isolates were confirmed by 16S rDNA gene sequencing, and Salmonella was identified by serum agglutination test, if the identification results of the 2 systems didn't match.

Results

The coincidence rates of 545 isolates of Enterobacteriaceae identified by MicroflexTM MALDI-TOF MS were 97.1% to the species level and 2.9% to the genus level,respectively. The coincidence rates of 545 isolates of Enterobacteriaceae identified by Vitek 2 Compact were 83.3%,13.9% and 2.2% to the species, group and genus levels, respectively. The false rate was 0.2%, and the un-identification rate was 0.4%.

Conclusions

The identification coincidence rate of Enterobacteriaceae by MicroflexTM MALDI-TOF MS is higher than that of Vitek 2 Compact. Using MicroflexTM MALDI-TOF MS to identify Enterobacteriaceae is fast,simple to operate and low-cost,and it can be used in routine rapid identification of Enterobacteriaceae in clinical microbiology laboratories.

Key words: Matrix-assisted laser desorption/ionization-time of flight mass spectrometry, Enterobacteriaceae, Identification

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