里埃变换红外光谱作为一种新的工具来调查Clostridioides difficile疫情:一个概念验证研究
Kerstin Locher1, Wilson Chan2, Sam D Chorlton3
1Division of Medical Microbiology, Department of Pathology and Laboratory Medicine, Vancouver Coastal Health, Vancouver, British Columbia, Canada; Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada.
Journal of microbiological methods
|August 16, 2025
概括
福里埃变换红外光谱 (FTIR) 显示了快速Clostridioides difficile疫情调查的希望. 这种方法可能有助于快速排除患者对患者的传播,补充全基因组测序.
科学领域:
- 微生物学与传染病的研究
- 光谱学和分析化学 分析化学
- 医院流行病学 医院流行病学
背景情况:
- 全基因组测序 (WGS) 是调查医院内Clostridioides difficile传播的标准,但在技术上要求高且耗时.
- 来自WGS的延迟可操作信息可能会阻碍及时的感染控制干预.
- 需要更快,更容易使用的方法来调查C. difficile疫情.
研究的目的:
- 评估富里埃变换红外光谱法 (FTIR) 作为调查Clostridioides difficile医院传播的快速替代方案.
- 优化FTIR参数,以准确识别C. difficile分离物中的克隆相关性.
- 将FTIR结果与全基因组测序 (WGS) 进行比较,用于疫情调查.
主要方法:
- 优化了FTIR光谱设置和数据分析协议,使用已知的C. difficile分离物.
- 评估了FTIR在疑似医院传染事件的隔离物中识别克隆相关性的能力.
- 基于FTIR的聚类与WGS单核酸多态 (SNP) 分析进行了比较.
主要成果:
- 优化的FTIR协议成功地集群了与克隆相关的C. difficile分离体,并将其与无关的分离.
- FTIR结果与WGS有很好的一致性,正确地识别了疫情中的隔离物,并区分了无关的.
- FTIR显示出高负预测值,有效排除了传播,但由于一个错误的阳性集群,具有较低的积极预测值.
结论:
- FTIR光谱是一种有前途的,快速的工具,用于初步的C. difficile疫情调查.
- FTIR可以有效地证实WGS的发现,并可能有助于排除患者传染.
- 进一步验证是有必要的,但FTIR提供了一个潜在的补充方法WGS感染控制.
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