针对探索糖尿病足部感染微生物群的多仪器分析
Michał Złoch1,2, Ewelina Maślak3, Wojciech Kupczyk4
1Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University in Toruń, Wileńska 4 Str, 87-100, Toruń, Poland. michal.zloch@umk.pl.
Current microbiology
|July 5, 2023
概括
矩阵辅助激光脱离离离电离飞行时间质谱 (MALDI TOF MS) 能够有效地识别多微生物糖尿病足感染 (DFI) 和检测耐药性,优于扩展光谱β-lactamases (ESBL) 和carbapenemases的传统方法.
科学领域:
- 微生物学 微生物学
- 传染性疾病 传染性疾病
- 分析化学 分析化学
背景情况:
- 糖尿病足部感染 (DFI) 是一种复杂的多微生物感染.
- 准确识别DFI微生物群和快速检测耐药性是具有挑战性的.
- 格拉姆阴性细菌对多重药物耐药性在DFI中的传播有显著的贡献.
研究的目的:
- 应用MALDI TOF MS,具有多种培养条件,用于DFI微生物模式的确定.
- 为了评估DFI的格拉姆阴性细菌分离物中的耐药性.
- 为了将 MALDI TOF MS 结果与分子和传统抗生素耐药性方法进行比较.
主要方法:
- 矩阵辅助激光吸附离子化飞行时间质谱学 (MALDI TOF MS) 采用多种培养条件.
- 16S rDNA测序和多重PCR用于分子识别和抵抗基因检测.
- 测试条用于常规抗生素耐药性测试.
主要成果:
- 马尔迪TOF MS确定97%的DFI为多微生物,涉及19个属和16个家族,主要是Enterobacteriaceae,Staphylococcaceae和Enterococcaceae.
- 基于MALDI的药物耐药性测定显示,与参考方法 (21%和2%) 相比,扩展光谱β-lactamases (ESBLs) 和carbapenemases生产者的比例更高 (31%和10%).
- DFI物种组成和耐药性发生率受到先前抗生素治疗的影响.
结论:
- MALDI TOF MS,结合多样化的培养条件和抗生素耐药性测试,可以在DFI中提供准确的微生物识别和耐药性检测.
- 这种方法有效地分离出常见和罕见的细菌物种.
- 马尔迪TOFMS对于检测ESBLs和carbapenemases特别有价值,对于管理多药耐药DFI至关重要.
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