在饮用水分配系统中,在微塑料压力下,耐细菌的抵抗变化和应激反应机制在微塑料压力下发生变化
Jingna Zhang1, Wencheng Ma2, Yibing Li3
1State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China.
Environmental pollution (Barking, Essex : 1987)
|June 7, 2024
概括
饮用水中的微塑料 (MP) 可以携带污染物并增强耐细菌 (CRB) 的抗生素耐药性. 这种相互作用改变了细菌的特性,增加了受污染水的健康风险.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 水的质量 水的质量
背景情况:
- 耐细菌 (CRB) 和微塑料 (MP) 是饮用水分配系统 (DWDS) 的污染物.
- 对于CRB和MPs对细菌进化和耐药性的综合影响尚不清楚.
研究的目的:
- 研究MP如何影响CRB的抗生素和消毒剂耐药性.
- 阐明MP引起的CRB特性和电阻变化背后的机制.
主要方法:
- 研究了硫甲醇 (SMX) 在聚烯 (PP) 和聚乙烯 (PE) MP 上的吸附/脱附.
- 对暴露于MP的CRB进行了抗生素敏感性测试和消毒实验.
- 分析了CRB的生理,生化和分子变化,包括细胞外聚合物 (EPS) 和抗生素耐药性基因 (ARGs).
主要成果:
- 国会议员可以将SMX等污染物吸附并释放到DWDS中.
- 国会议员显著提高了CRB对抗生素和消毒剂的耐药性.
- 对MP的CRB附着改变了EPS组成,增加了疏水性,刺激了氧化应激,并增加了ARGs.
结论:
- 国会议员充当污染物的载体,并在DWDS中促进CRB中抗生素耐药性的演变.
- 了解这些机制对于减轻对水质的生物风险至关重要.
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