从尿样直接进行快速识别和敏感性测试,缩短周转时间,迈向更先进的诊断管理的一步
Maitrayee Narayan1, Sarita Mohapatra1, Bimal Das1
1Department of Microbiology, All India Institute of Medical Sciences, New Delhi, IND.
Cureus
|November 3, 2025
概括
这项研究结合了矩阵辅助激光脱/电离飞行时间质谱 (MALDI-TOF MS) 和直接抗微生物敏感性测试 (AST) 以快速诊断尿路感染 (UTI). 新方法显著减少了常见泌尿病原体的周转时间,改善了患者的护理.
科学领域:
- 临床微生物学 临床微生物学
- 诊断技术 诊断技术的使用
- 传染性疾病 传染性疾病
背景情况:
- 尿路感染 (UTI) 是一种常见的细菌感染,诊断周转时间 (TAT) 为48-72小时.
- 目前的诊断依赖于培养和抗微生物敏感性测试 (AST),延迟治疗.
- 快速诊断对于有效的抗菌药物管理至关重要.
研究的目的:
- 为了减少诊断TAT常见的尿病原体,如大肠杆菌和肺炎Klebsiella.
- 实施一个直接MALDI-TOFMS识别和直接AST的联合协议.
- 改善诊断管理,并使及时的患者干预成为可能.
主要方法:
- 直接MALDI-TOFMS用于从尿样中鉴定病原体.
- 直接AST在多个时间点 (4,6,8,16-20小时) 进行和读取.
- 结果与基于培养的MALDI-TOF MS和VITEK II进行了比较,以确定准确性和一致性.
主要成果:
- 直接MALDI-TOFMS实现了高的识别准确度 (88.2%的标准化,90.7%的验证).
- 直接AST在6-8小时内对大多数抗生素表现出>90%的绝对一致性.
- 综合方案将TAT减少了39-43小时.
结论:
- 直接MALDI-TOFMS和直接AST的联合方案是可行的,以快速诊断尿路感染.
- 最终的鉴定和AST结果可以在样本接收后6-8小时内获得.
- 这种方法支持诊断管理和及时的治疗决策.
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