Hannah Greenwald Healy, Aliya Ehde, Alma Bartholow, Rose S Kantor, Kara L Nelson
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引用次数: 0
摘要
在 COVID-19 大流行期间,非居民用水需求的减少凸显了了解水龄如何影响饮用水水质和管道输水系统中微生物群的重要性。我们利用台式模型配水系统,旨在描述水龄升高对散装水和管壁生物膜中微生物群的影响。在建筑物关闭前的 6 个月和关闭后的 7 个月中,我们向五个重复的恒流反应器中注入了市政氯化自来水。建筑物关闭后,进入反应器的氯胺含量下降;反应器散装水和生物膜中的平均细胞数和 ATP 浓度增加了一个数量级,而机会性病原体的检出率仍然很低。水龄和相应的物理化学变化对微生物丰度和群落组成有很大影响。不同的初始微生物定植也对每个反应器中的微生物群落产生了持久的影响(即历史偶然性)。
Responses of drinking water bulk and biofilm microbiota to elevated water age in bench-scale simulated distribution systems.
Reductions in nonresidential water demand during the COVID-19 pandemic highlighted the importance of understanding how water age impacts drinking water quality and microbiota in piped distribution systems. Using benchtop model distribution systems, we aimed to characterize the impacts of elevated water age on microbiota in bulk water and pipe wall biofilms. Five replicate constant-flow reactors were fed with municipal chloraminated tap water for 6 months prior to building closures and 7 months after. After building closures, chloramine levels entering the reactors dropped; in the reactor bulk water and biofilms the mean cell counts and ATP concentrations increased over an order of magnitude while the detection of opportunistic pathogens remained low. Water age, and the corresponding physicochemical changes, strongly influenced microbial abundance and community composition. Differential initial microbial colonization also had a lasting influence on microbial communities in each reactor (i.e., historical contingency).
期刊介绍:
npj Biofilms and Microbiomes is a comprehensive platform that promotes research on biofilms and microbiomes across various scientific disciplines. The journal facilitates cross-disciplinary discussions to enhance our understanding of the biology, ecology, and communal functions of biofilms, populations, and communities. It also focuses on applications in the medical, environmental, and engineering domains. The scope of the journal encompasses all aspects of the field, ranging from cell-cell communication and single cell interactions to the microbiomes of humans, animals, plants, and natural and built environments. The journal also welcomes research on the virome, phageome, mycome, and fungome. It publishes both applied science and theoretical work. As an open access and interdisciplinary journal, its primary goal is to publish significant scientific advancements in microbial biofilms and microbiomes. The journal enables discussions that span multiple disciplines and contributes to our understanding of the social behavior of microbial biofilm populations and communities, and their impact on life, human health, and the environment.