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Reduction of Pathogenic and Indicator Viruses at a Drinking Water Treatment Plant in Southern Louisiana, USA.
Tandukar, Sarmila; Sherchan, Samendra P; Haramoto, Eiji.
Afiliación
  • Tandukar S; Interdisciplinary Center for River Basin Environment, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi, 400-8511, Japan.
  • Sherchan SP; Department of Environmental Health Sciences, Tulane University, 1440 Canal Street, Suite 2100, New Orleans, LA, 70112, USA.
  • Haramoto E; Interdisciplinary Center for River Basin Environment, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi, 400-8511, Japan. eharamoto@yamanashi.ac.jp.
Food Environ Virol ; 12(3): 269-273, 2020 09.
Article en En | MEDLINE | ID: mdl-32666473
Monthly sampling was conducted at a drinking water treatment plant (DWTP) in Southern Louisiana, USA from March 2017 to February 2018 to determine the prevalence and reduction efficiency of pathogenic and indicator viruses. Water samples were collected from the DWTP at three different treatment stages (raw, secondary-treated, and chlorinated drinking water) and subjected to quantification of seven pathogenic viruses and three indicator viruses [pepper mild mottle virus (PMMoV), tobacco mosaic virus (TMV), and crAssphage] based on quantitative polymerase chain reaction. Among the seven pathogenic viruses tested, only Aichi virus 1 (AiV-1) (7/12, 58%) and noroviruses of genogroup II (NoVs-GII) (2/12, 17%) were detected in the raw water samples. CrAssphage had the highest positive ratio at 78% (28/36), and its concentrations were significantly higher than those of the other indicator viruses for all three water types (P < 0.05). The reduction ratios of AiV-1 (0.7 ± 0.5 log10; n = 7) during the whole treatment process were the lowest among the tested viruses, followed by crAssphage (1.1 ± 1.9 log10; n = 9), TMV (1.3 ± 0.9 log10; n = 8), PMMoV (1.7 ± 0.8 log10; n = 12), and NoVs-GII (3.1 ± 0.1 log10; n = 2). Considering the high abundance and relatively low reduction, crAssphage was judged to be an appropriate process indicator during drinking water treatment. To the best of our knowledge, this is the first study to assess the reduction of crAssphage and TMV during drinking water treatment.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Virus del Mosaico del Tabaco / Agua Potable / Tobamovirus / Enterovirus / Kobuvirus Tipo de estudio: Risk_factors_studies Idioma: En Revista: Food Environ Virol Año: 2020 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Virus del Mosaico del Tabaco / Agua Potable / Tobamovirus / Enterovirus / Kobuvirus Tipo de estudio: Risk_factors_studies Idioma: En Revista: Food Environ Virol Año: 2020 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Estados Unidos