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Sherchan, Samendra P.; Shahin, Shalina; Ward, Lauren M.; Tandukar, Sarmila; Aw, Tiong G.; Schmitz, Bradley; Ahmed, Warish; Kitajima, Masaaki
The Science of the total environment, 11/2020, Letnik: 743Journal Article
We investigated the presence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) RNA in wastewater samples in southern Louisiana, USA. Untreated and treated wastewater samples were collected on five occasions over a four-month period from January to April 2020. The wastewater samples were concentrated via ultrafiltration (Method A), and an adsorption–elution method using electronegative membranes (Method B). SARS-CoV-2 RNA was detected in 2 out of 15 wastewater samples using two reverse transcription-quantitative polymerase chain reaction (RT-qPCR) assays (CDC N1 and N2). None of the secondary treated and final effluent samples tested positive for SARS-CoV-2 RNA. To our knowledge, this is the first study reporting the detection of SARS-CoV-2 RNA in wastewater in North America, including the USA. However, concentration methods and RT-qPCR assays need to be refined and validated to increase the sensitivity of SARS-CoV-2 RNA detection in wastewater. Display omitted •First study in Louisiana, USA reporting the detection of SARS-CoV-2 RNA in wastewater using ultrafiltration.•Two out of seven untreated wastewater samples tested positive for SARS-CoV-2 RNA.•None of the secondary treated and final effluent samples tested positive.•Concentration methods and RT-qPCR assays applied for SARS-CoV-2 RNA detection need further refinement.
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