亚热带饮用水河流-水库系统表面水中的抗生素耐药基因概况
Lin Liu1, Shan-Bin Guang2, Yu Xin1
1Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Environmental pollution (Barking, Essex : 1987)
|September 27, 2023
概括
这项研究调查了亚热带河水库系统中的抗生素耐药基因 (ARG),发现了440个ARG. 营养素等环境因素显著影响了ARG的丰富性和多样性.
科学领域:
- 环境微生物学 环境微生物学
- 评估水质水质的评估.
- 抗微生物耐药性 抗微生物耐药性
背景情况:
- 抗生素耐药基因 (ARG) 对公共健康和生态系统构成重大威胁.
- 了解饮用水源中ARG的流行率和驱动因素对于风险评估至关重要.
- 亚热带河流水库系统代表了ARG动态的复杂环境.
研究的目的:
- 在东河水库系统中全面描述抗生素耐药基因 (ARG).
- 研究ARG多样性,细菌宿主和耐药机制的时空特征.
- 确定影响ARG概况变化的关键环境因素.
主要方法:
- 使用分子方法检测和定量440个ARG.
- 对与ARG相关的细菌宿主群体的分析.
- 评估阻力机制 (外流,无活化,目标变化).
- 对环境因素 (营养素,温度,pH值) 的统计分析及其与ARG的相关性.
主要成果:
- 总共有440个ARG被检测到,分布受河流输入和当地演变的影响.
- 蛋白质细菌,动态细菌和细菌群是ARG的主要宿主.
- 抗生素排放是雨季的主要机制;在干旱季节观察到多种机制.
- 季节性变化对ARG的丰富性产生了显著的影响,而不是空间变化.
- 化和总有机碳度是ARG数量和机制比例的关键驱动因素.
- 氨,总有机碳,温度和pH影响了ARG的相对丰度.
结论:
- 表面水中的ARG多样性主要是由水平基因转移和抗生素生物合成驱动的.
- 营养素通过提供能量而不是增加细菌繁殖,促进了ARG的丰富性.
- 有效地管理营养水平对于控制饮用水系统中的ARG至关重要.
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