病原性细菌对环境塑料废物的快速殖民驱动了适应性表型变化
Michael J Ormsby1, Luke Woodford1, Rosie Fellows1
1Biological and Environmental Sciences, Faculty of Natural Sciences, University of Stirling, Stirling FK9 4LA. UK.
Journal of hazardous materials
|November 6, 2024
概括
致病性大肠杆菌O157迅速殖民于塑料表面,持续数周并增加人类感染风险. 重复循环增强毒性和抗生素耐受性,造成共同污染的风险.
科学领域:
- 环境微生物学环境微生物学
- 病原体动态 病原体动态
- 塑料污染对塑料污染的影响
背景情况:
- 在塑料污染上存在的微生物生物膜 ("塑球") 作为细菌的储存库.
- 塑球促进了病原体的传播,增加了人类暴露的风险.
- 了解病原体-塑料相互作用对于评估环境持久性至关重要.
研究的目的:
- 为了研究致病性大肠杆菌O157在塑料上的快速殖民动态.
- 在模拟环境条件下确定大肠杆菌O157在塑料表面的持久性.
- 评估重复的殖民-解离周期对病原体毒性和适应性的影响.
主要方法:
- 利用模拟的环境条件来模仿自然环境.
- 在塑料材料上量化大肠杆菌O157的殖民和持久性.
- 分析E. coli O157的表型变化,这些变化是在重复的附着和脱离塑球的循环之后发生的.
主要成果:
- 致病性大肠杆菌O157在30分钟内迅速殖民塑料.
- 在感染性度下,大肠杆菌O157在塑料上持续至少21天.
- 重复的殖民周期增强了大肠杆菌O157的持久性,生物膜的形成和抗生素耐受性.
结论:
- 塑层是致病性大肠杆菌O157的重要储存库,促进其在环境中的持久性.
- 塑料污染有助于选择更有毒和持久的病原体菌株.
- 这种适应增加了与塑料废物和微生物病原体相关的共同污染物的风险.
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