基于拉曼的抗菌素敏感性测试对抗生素的最后手段
Zhirou Xiao1, Liping Qu2, Haijun Chen1
1Department of Laboratory Medicine, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, People's Republic of China.
Infection and drug resistance
|August 28, 2023
概括
重水标记的拉曼光谱技术提供了快速的抗微生物敏感性测试 (AST),在5小时内与传统方法达成100%的一致性. 这一突破加速了抗生素耐药性测试,这对于打击全球健康威胁至关重要.
科学领域:
- 微生物学 微生物学
- 频谱学是一种光谱学.
- 生物化学 生物化学
背景情况:
- 抗生素耐药性是一个关键的全球卫生问题,耐药性最后的避险药物加剧了.
- 快速而准确的抗微生物敏感性测试 (AST) 对于有效的抗生素管理至关重要.
- 标有重水 (二氧化,D2O) 的拉曼光谱为微生物诊断提供了一个有希望的,节省时间的替代方案.
研究的目的:
- 开发和验证基于拉曼的AST方法,用于评估最后的抗生素.
- 评估tigecycline,polymyxin B和vancomycin对关键耐药细菌菌株的疗效.
- 为了建立一个新的指标,用拉曼光谱法确定最小抑制度 (R-MIC),并与传统方法进行比较.
主要方法:
- 优化了对拉曼光谱学的合物和实验条件.
- 评估了抗生素对大肠杆菌,肺炎克勒布塞拉,空气真菌和菌的有效性.
- 与传统微稀释方法的最小抑制度 (MIC) 进行R-MIC值比较,使用基本和分类协议,以及斯皮尔曼等级相关性.
主要成果:
- 基于拉曼的AST方法在5小时内与传统方法达成100%的分类一致,比24小时标准快得多.
- R-MIC值与MIC值保持68.5%的一致性.
- 在R-MIC和MIC之间观察到高相关性 (斯皮尔曼r=0.96) 和100%的基本协议.
结论:
- 优化的基于拉曼的AST方法有效地克服了传统AST的时间限制.
- 这种快速诊断工具对改善抗生素耐药性感染的管理具有重大前景.
- 进一步应用这种技术可以帮助合理使用抗生素,并打击抗菌素耐药性.
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