Link between cases of COVID 19 and viral loads in wastewater
Written By : Isra Zaman
Medically Reviewed By : Dr. Kamal Kant Kohli
Published On 2022-08-23 04:15 GMT | Update On 2022-08-23 04:15 GMT
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In this study, the authors wanted to examine the association between clinically reported cases and viral loads in wastewater. They correlated the results of 360 samples collected from manholes in 7 distinct areas of the Village with confirmed COVID-19 cases obtained from the Organizing Committee, and with data of close contacts tests from a previous report.
The researchers found that SARS-CoV-2 was present in 151 wastewater samples—53 from the Olympics and 98 from the Paralympics. The number of confirmed cases was also higher in the Paralympics. The strongest correlation between SARS-CoV-2 RNA load in wastewater and the presence of clinical positive areas was found in areas that had maximum viral loads in wastewater in a three-day span.
The study suggests that WBE and clinical tests are complementary and that the testing strategy played a role in preventing COVID-19 clusters in the Village. This study of one of the world's largest mass gatherings provides novel evidence on the implementation and use of wastewater-based epidemiology in communities where all members undergo daily testing, and could be used to trace and control COVID-19 clusters in the future.
Ref:
Masaaki Kitajima et al,Association of SARS-CoV-2 Load in Wastewater With Reported COVID-19 Cases in the Tokyo 2020 Olympic and Paralympic Village From July to September 2021,JAMA Network Open,10.1001/jamanetworkopen.2022.26822
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