宏基因二代测序技术对肝脓肿病原学诊断的价值

目的:探讨宏基因二代测序(metagenomics next-generation sequencing，mNGS)技术对肝脓肿病原学诊断的价值。方法:前瞻性纳入2020年2月至2021年4月复旦大学附属中山医院急诊科收治的35例肝脓肿患者，采用常规微生物培养法和mNGS技术分别检测血液和脓肿引流液样本。并将患者按是否出现休克分为两组，采用SPSS 25.0进行统计学分析，对比分析两组患者之间的差异。结果:mNGS技术在血液样本和引流液样本中总体检测阳性率显著高于常规培养法(血液：67.6% vs. 15.2%， P<0.05；引流液：100% vs. 55.2%， P<0.05)。35例肝脓肿病例中71.4%检出致病病原体为肺炎克雷伯菌。休克组患者脓肿引流液样本中mNGS检测出的致病病原体序列数显著高于非休克组( P<0.05)。 结论:mNGS能够快速准确的检测出肝脓肿的致病病原体，为临床精准治疗提供重要的病原学依据。

Etiological diagnostic value of metagenomics next-generation sequencing in liver abscess

Objective:To explore the value of metagenomic next-generation sequencing (mNGS) in the pathogen diagnosis of liver abscess.Methods:A perspective study was performed in 35 hospitalized patients with liver abscess in Department of Emergency Medicine, Zhongshan Hospital, Fudan University from February 2020 to April 2021. Blood samples and abscess drainage fluid samples were detected by routine microbial culture and mNGS. Patients were divided into two groups according to whether they had septic shock or not. SPSS 25.0 was used for statistical analysis.Results:The overall positive rate of mNGS in blood samples and drainage fluid samples was significantly higher than that of routine microbial culture methods (blood: 67.6% vs. 15.2%, P<0.05; Drainage fluid: 100% vs. 55.2%, P<0.05). In 35 patients with liver abscess, 71.4% of the pathogens were Klebsiella pneumoniae. The sequence number of pathogenic pathogens detected by mNGS in abscess drainage fluid samples of patients in the shock group was significantly higher than that in the non-shock group ( P<0.05). Conclusions:The mNGS can quickly and accurately detect the pathogen of liver abscess, which can provide important etiological diagnostic for clinical treatment.