在COVID-19大流行期间,建筑物中长时间的水停滞增加了机会性病原体带来的风险
Casey K Huang1,2, Anjani Weerasekara1,2, Ji Lu1
1Australian Centre for Water and Environmental Biotechnology (ACWEB, formerly AWMC), The University of Queensland, QLD 4072, Australia.
Water research X
|December 15, 2023
概括
在封锁期间建筑水的停滞促进了机会性病原体的生长. 无处不在发现非结核性菌根菌,而冲洗减少了军团菌,但在低的地区没有NTM.
科学领域:
- 环境微生物学环境微生物学
- 公共卫生 公共卫生
- 水上安全 水上安全
背景情况:
- 建筑用水系统可以在低占用率和水需求期间庇护机会性病原体 (OPs).
- 锁定后重新开放建筑物,可能会造成公共卫生风险,因为可能会出现Legionella和非结核性真菌菌 (NTM) 等OP的重新生长.
研究的目的:
- 调查与COVID-19封锁期间建筑水停滞相关的微生物风险.
- 在不同的占用率下,对大学饮用水出口中的机会性病原体和微生物群进行表征.
- 评估冲洗作为补救策略的有效性.
主要方法:
- 从城市和农村大学校园的24个饮用水网点收集了第一次冲洗和冲洗后的水样.
- 利用了培养物依赖和培养物独立的方法,包括流细胞计,qPCR和16SrRNA基因测序.
- 分析了Legionella spp.,Pseudomonas aeruginosa和NTM,以及残留和总含量.
主要成果:
- 长时间的水停滞与更高和更多样化的微生物生长相关.
- 在所有采样的销售点中,NTM无处不在,在停滞不前的城市校园建筑中度更高.
- 30分钟的冲洗使军团菌减少了1个日志,但不足以恢复或减少农村校园中的NTM.
结论:
- 水的停滞对微生物群落的组成有重大影响,并促进了建筑水系统中机会性病原体的扩散.
- 定期监测残留物和实施水风险管理计划对于非医疗保健公共建筑至关重要.
- 单独冲洗可能不足以控制低消毒剂残留量系统中的OP.
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