消毒后异质的存活率是增加耐受性演变的基础
Niclas Nordholt1, Lydia-Yasmin Sobisch1, Annett Gödt1
1Division of Biodeterioration and Reference Organisms (4.1), Department of Materials and the Environment, Federal Institute for Materials Research and Testing (BAM), Berlin, Germany.
Microbiology spectrum
|October 22, 2024
概括
细菌的持久性可以在消毒剂治疗中存活下来,导致治疗失败,并可能促进耐药性. 这项研究表明,大肠杆菌中的持久性与不断变化的消毒剂耐受性有关,影响感染控制策略.
科学领域:
- 微生物学 微生物学
- 进化生物学 进化生物学
- 传染性疾病 传染性疾病
背景情况:
- 消毒对于感染控制至关重要,但幸存的细菌可以发展出耐药性.
- 细菌持久性是耐受有毒压力的亚种群,可能导致治疗失败.
- 持久剂在消毒剂耐受性和演变中的作用尚不清楚.
研究的目的:
- 调查细菌持久物对消毒有效性的影响.
- 确定消毒剂持久性是否有助于消毒剂耐受性增加的演变.
- 探索持久存在和进化能力之间的联系 降低敏感性.
主要方法:
- 暴露于六种消毒剂 (H2O2,GTA,CHX,BAC,DDAC,ISO) 的大肠杆菌的时间杀伤动力学.
- 数学建模以推断时间杀死数据的持久存在.
- 在反复消毒下进行实验进化,以评估适应性.
主要成果:
- 在暴露于甲 (BAC) 和异醇 (ISO) 的大肠杆菌中检测到持久性,但对H2O2,甲 (GTA) 或氧化 (CHX) 没有显著的影响.
- 实验进化导致在预测持久性的人群中增加了对BAC和ISO的耐受性.
- 暴露于GTA和CHX的种群,缺乏显著的持久性,未能适应并灭绝.
结论:
- 细菌持续性在消毒失败和消毒剂耐受性的演变中发挥着重要作用.
- 持久性菌的存在是一个关键因素,使细菌能够进化,对消毒剂的敏感性降低.
- 了解消毒剂持久性对于预测和减轻抗菌素耐药性的演变至关重要.
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