在城市食品废弃物处理系统中的空气传播病原体群体的动态和聚集模式及其风险影响
Liangmao Zhang1, Binghan Wang1, Kaiyi Li2
1Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China; College of Resource Environment and Tourism, Hubei University of Arts and Science, Xiangyang 441053, China.
Environment international
|November 20, 2024
概括
空气中的病原体在食品废物处理厂的空气中比城市空气更为丰富. 随机过程驱动病原体社区聚集,在室内增加,造成持续暴露的风险.
科学领域:
- 环境微生物学环境微生物学
- 公共卫生 公共卫生
- 废物管理 废物管理
背景情况:
- 城市固体废物 (MSW) 环境是已知的病原体储库.
- 在MSW处理设施内,空气中的微生物群落,特别是致病细菌,研究不足.
- 了解空气传播病原体的动态对于评估公共卫生风险至关重要.
研究的目的:
- 调查食品废弃物处理厂 (FWTPs) 的可吸入颗粒物相关的空气传播潜在致病细菌的组成和组装.
- 为了将FWTPs影响的空气中的空气中的空气传播病原体群体与城市空气进行比较.
- 阐明推动社区结构和空气传播病原体聚集过程的因素.
主要方法:
- 组合的安普利康和元基因组学测序.
- 在FWTP和城市空气中空气中的颗粒物 (PM2.5和PM10) 的时空采样.
- 使用中性模型和环境变量相关性,分析细菌社区结构,丰度和组装过程.
主要成果:
- 致病细菌占FWTP空气传播群体的很大一部分 (64.5%±20.6%),其物种数量和相对丰度是城市空气的2-4倍.
- 空气传播病原体社区结构受到采样位置 (处理单位) 的影响,但在季节和颗粒大小之间保持一致.
- 随机过程 (58.8%-96.8%) 是病原体社区聚集的主要驱动因素,从室外到室内环境的重要性越来越大.
结论:
- FWTPs对空气中的病原体有很大贡献,与一般城市空气相比,它们的暴露风险更高.
- 与生物膜相关的物种如Acinetobacter johnsonii的主导地位强调了持续的气溶风险.
- 室内增加的随机性表明人为活动可能会破坏微生物的稳定性,需要有针对性的缓解策略.
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