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Science in One Health 2022年第1期1卷 67-75页

作者： Bruno Aschidamini Prandi Arthur Tonietto Mangini Waldemir Santiago Neto Andre Jarenkow Lina Violet-Lozano Aline Alves Scarpellini Campos Evandro Ricardo da Costa Colares Paula Regina de Oliveira Buzzetto Camila Bernardes Azambuja Lisiane Correa de Barros Trombin Margot de Souza Raugust rafaela lorenzini Alberto da Silva Larre Caroline Rigotto Fabrício Souza Campos Ana Claudia Franco Virology Laboratory Institute for Basic Health SciencesFederal University of Rio Grande do SulBrazil State Center for Health Surveillance Rio Grande do Sul State Health DepartmentPorto AlegreRio Grande do Sul90119-900Brazil Municipal Water and Sewage department Porto AlegreRio Grande do SulBrazil FEEVALE University ERS 239 n°2755Novo HamburgoRS93352-000Brazil

Wastewater-based epidemiology(WBE)may be successfully used to comprehensively monitor and determine the scale and dynamics of some infections in the *** monitored severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)RNA in raw wastewater samples from Porto Alegre,Southern *** samples were collected and analyzed every week between May 2020 to May ***,different social restrictions were applied according to the number of hospitalized patients in the *** samples were obtained from two wastewater treatment plants(WWTP),named Navegantes and *** determine the SARS-CoV-2 RNA titers in wastewater,we performed RT-qPCR analysis targeting the N gene(N1).The highest titer of SARS-CoV-2 RNA was observed between epidemiological weeks(EWs)33-37(August),42-43(October),45-46(November),49-51(December)in 2020,and 1-3(January),7-13(February to March)in 2021,with viral loads ranging from 1-106-3-106 genomic copies/*** increase in positive confirmed cases followed such high viral *** on the sampling method used,positive cases increased in 6-7 days and 15 days after the rise of viral RNA titers in wastewater,with composite sampling methods showing a lower time lag and a higher resolution on the *** results showed a direct relation between strict social restrictions and the loads of detected RNA reduction in wastewater,corroborating the number of confirmed *** in viral loads between different sampling points and methods were observed,as composite samples showed more stable results during the analyzed ***,viral loads obtained from samples collected at Serraria WWTP were consistently higher than the ones obtained at Navegantes WWTP,indicating differences in local dynamics of SARS-CoV-2 spread in different regions of Porto *** conclusion,wastewater sampling to monitor SARS-CoV-2 is a robust tool to evaluate the viral loads contributing to hospitalized patients’data and confirmed ***

关键词： SARS-CoV-2 Wastewater based epidemiology Social restrictions RT-qPCR Ultracentrifugation

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