Wastewater surveillance for earlier detection of seniors congregate living COVID-19 outbreaks in Peterborough, Ontario.

Thomas Piggott, Mohamed Kharbouch, Michael Donaldson, Carolyn Pigeau, Donna Churipuy, Gillian Pacey, Christopher Kyle
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Abstract

The coronavirus disease 2019 (COVID-19) pandemic has disproportionately affected seniors living in congregate living settings. The evolving surveillance context has led to novel use of wastewater surveillance to monitor levels of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in these settings. This study presents a pilot of upstream congregate living wastewater surveillance of SARS-CoV-2 for the detection of COVID-19 outbreaks and the effects of early public health interventions. We monitored localized wastewater SARS-CoV-2 levels from four congregate living settings March 15, 2021 to October 1, 2022 and correlated these levels with suspected and confirmed COVID-19 outbreaks determined by other methods. We identified five wastewater signals that correlated with confirmed outbreaks and three wastewater signals that did not correlate with subsequent outbreaks. In the five confirmed outbreaks, the wastewater signal was detected 2-10 days (median, five days) prior to confirmation of the outbreak by case testing. This pilot demonstrates upstream sampling for SARS-CoV-2 in wastewater may effectively detect outbreaks prior to their detection through symptomatic case testing and could support a balanced approach to outbreak response in congregate living settings, leading to increased wellbeing of these residents.

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安大略省彼得伯勒市为及早发现老年人聚居区 COVID-19 爆发而进行的废水监测。
2019 年冠状病毒病(COVID-19)大流行对居住在集体生活环境中的老年人造成了极大的影响。不断变化的监测环境促使人们采用新颖的废水监测方法来监测这些环境中严重急性呼吸系统综合征冠状病毒 2(SARS-CoV-2)的水平。本研究介绍了一项对 SARS-CoV-2 进行上游集中式生活废水监测的试点项目,以检测 COVID-19 的爆发情况和早期公共卫生干预措施的效果。我们监测了 2021 年 3 月 15 日至 2022 年 10 月 1 日四个集中居住区的局部废水中的 SARS-CoV-2 水平,并将这些水平与其他方法确定的疑似和确诊 COVID-19 爆发相关联。我们确定了五个与确诊疫情相关的废水信号和三个与后续疫情无关的废水信号。在五次确诊疫情中,废水信号是在病例检测确诊疫情前 2-10 天(中位数为五天)检测到的。这项试验表明,对废水中的 SARS-CoV-2 进行上游采样,可以在通过症状病例检测发现疫情之前有效地检测出疫情,并可支持在集中居住环境中采取平衡的方法应对疫情,从而提高这些居民的健康水平。
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