Vitek-2 Compact和MALDI TOF MS对棒状杆菌属细菌鉴定能力评估

Evaluation of the Performance of VITEK-2 Compact,VITEK MS and Bruker MS on the Identification of Corynebacterium

目的：评估 VITEK-2 compact微生物鉴定系统、法国生物梅里埃公司及德国 Bruker公司的 MALDI TOF MS对棒状杆菌的鉴定能力。方法学评价研究选择来自法国生物梅里埃公司的棒状杆菌40株，以16S rDNA测序为金标准，分别使用 VITEK-2 compact，VITEK MS及 Bruker MS进行鉴定，对其鉴定率、检测时间及耗材成本作描述性分析。结果 VITEK-2 compact，VITEK MS及Bruker MS正确鉴定至种水平的鉴定率分别为95.0％，88.9％和97.5％，平均检测时间分别为5～6 h，2～3 min和2～3 min，检测耗材成本约为50～70元、15～25元和10～20元。结论三种方法均具有较高的正确鉴定率，能够满足临床的鉴定需要，但 VITEK MS对无植酸棒状杆菌鉴定能力需要进一步提高。

Objective To evaluate the performance of VITEK-2 compact,VITEK MS and Bruker MS on the identification of Corynebacterium.Methods This was a methodological evaluation study.The 40 Corynebacterium from bioMerieux were i-dentified with the three methods respectively.16S rDNA gene sequencing was conducted as reference method.Made a de-scriptive analysis of the identification ability,time and cost.Resulets The accuracy of species level of the three methods was 95.0%,88.9% and 97.5%.The mean time was 5～6 h,2～3 min and 2～3 min.The cost of consumable was 50～70 yuan, 15～25 yuan and 10～20 yuan.Conclution Three methods with high accuracy can meet the requirement of clinical diagno-sis,and the identification ability of VITEK MS on Corynebacterium amycolatum need to be further improved.