摘要
目的应用MALDI—TOFMS鉴定临床常见病原菌。方法复苏560株临床分离株,其中革兰阳性细菌(G^+)260株、革兰阴性细菌(G^-)180株、酵母菌60株、肠道致病菌60株。MALDI—TOFMS鉴定结果与Vitek2Compact全白动微生物鉴定系统比对,结果差异菌株采用16SrDNA测序验证。结果MALDI—TOFMS与Vitek2Compact鉴定结果比较,G^+细菌鉴定符合率为94.6%(246/260),G^-细菌鉴定符合率为96.7%(174/180),酵母菌鉴定符合率为95.0%(57/60),肠道致病菌鉴定符合率为93.3%(56/60)。15株鉴定结果不符的菌株经16SrDNA测序确认,结果与Vitek2Compact和MALDI—TOFMS鉴定符合率分别为26.7%(4/15)和66.7%(10/15)。结论MALDI—TOFMS可用于常见病原微生物鉴定,其快速、低成本的特点具有推广价值。
Objective To identify the pathogenic microorganism by MALDI-TOF MS. Methods A total of 560 strains were resuscitated, which included 260 gram-positive bacteria strains, 180 gram-negative bacteria strains, 60 yeast-like-fungi strains and 60 enteropathogenic bacteria strains. Comparing MALDI-TOF MS with Vitek2 Compact, the discordant resuhs were validated by 16S rDNA sequencing. Results Comparing MALDI-TOF MS with Vitek2 Compact, the coincidence rate was 94. 6% (246/260) for gram-positive bacteria, 96.7% (174/180) for gram-negative bacteria,95% (57/60) for yeast-like-fungi, and 93.3% (56/60) for enteropathogenic bacteria. Fifteen strains were validated by 16S rDNA gene sequencing. Comparing with sequencing, the coincidence rate of two methods was 66. 7% (10/15) for MALDI-TOF MS and 26. 7% (4/11) for Vitek2 Compact, respectively. Conclusion MALDI-TOF MS shows rapid turnaround time and modest reagent costs, and it will be another effective tool for microorganism diagnosis.
出处
《中华检验医学杂志》
CAS
CSCD
北大核心
2011年第11期988-992,共5页
Chinese Journal of Laboratory Medicine
基金
国家自然科学基金资助项目(30970126)
关键词
细菌
酵母菌
光谱法
质量
基质辅助激光解吸电离
Bacteria
Yeasts
Spectrometry,mass,matrix-assisted laser resorption-ionization