探索动态表面张力与四级氨基化消毒剂的抗菌活性之间的相关性
Germán G Vargas-Cuebas1, Christian A Sanchez2, Samantha R Brayton3
1Department of Microbiology and Immunology, Emory University, 30322, Atlanta, GA, USA.
ChemMedChem
|May 8, 2024
概括
动态表面张力 (DST) 测量有效地选四级化合物 (QAC) 消毒剂的真实世界杀菌活性,与传统的最小抑制度 (MIC) 测试不同. 这种物理性质为评估消毒剂对细菌的有效性提供了更快的方法.
科学领域:
- 微生物学 微生物学
- 表面化学 表面化学
- 抗菌剂 抗菌剂 抗菌剂
背景情况:
- 四次性化合物 (QAC) 是重要的消毒剂,但传统的抗微生物检测,如MIC和时间杀伤,对于查来说是耗时的.
- 在现实的条件下评估QAC的有效性,例如在硬水中,对于有效的消毒至关重要.
- 了解物理性质和抗微生物活性之间的关系可以简化消毒剂的开发.
研究的目的:
- 调查动态表面张力 (DST) 与QACs的抗菌活性 (抑制和杀菌) 之间的相关性.
- 在模拟的真实条件下,评估QAC对格拉姆阳性 (金黄色葡萄球菌) 和格拉姆阴性 (假黄球菌) 细菌的性能.
- 探索诸如硬水和 counterions 等因素对 QAC 杀菌活性的影响.
主要方法:
- 测试了一个结构多样化的QAC面板,对S. aureus和P. aeruginosa进行了测试.
- 测量了QACs的动态表面张力 (DST).
- 评估的最小抑制度 (MIC) 和杀菌活性,包括在硬水条件下.
主要成果:
- 在现实的消毒条件下,DST测量与杀菌活性有很好的相关性,但与MIC值无关.
- 测试QACs的抑制和杀菌活性之间没有发现一致的相关性.
- 对P. aeruginosa的杀菌效果在硬水中显著降低,而QAC对手则影响了这一效果.
- 一些QAC在与其他商业QAC结合时显示出增强的杀菌活性.
结论:
- 动态表面张力 (DST) 可以在模仿现实世界消毒的条件下作为QACs杀菌活性的可靠选方法.
- 传统的MIC测定可能不能准确地反映QAC的实际杀菌性能,特别是在像硬水这样具有挑战性的环境中.
- 包括对抗剂的选择和组合在内的QAC配方对其有效性起着重要作用,特别是在硬水中.
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