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Prevalence of norovirus and factors influencing virus concentrations during one year in a full-scale wastewater treatment plant

Nordgren, Johan (author)
Linköpings universitet,Medicinsk mikrobiologi,Hälsouniversitetet
Matussek, Andreas (author)
Department of Clinical Microbiology, County Hospital Ryhov, 55185 Jönköping, Sweden
Mattsson, Ann (author)
Gryaab AB, Gothenburg, Sweden
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Svensson, Lennart (author)
Linköpings universitet,Molekylär virologi,Hälsouniversitetet
Lindgren, Per-Eric (author)
Linköpings universitet,Molekylär virologi,Hälsouniversitetet
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 (creator_code:org_t)
Elsevier BV, 2009
2009
English.
In: Water Research. - : Elsevier BV. - 0043-1354 .- 1879-2448. ; 43:4, s. 1117-1125
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Norovirs (NoV) is a leading cause of acute gastroenteritis and is often spread via wastewater contamination. Little is known about how the wastewater treatment process affects norovirus, and which factors influence virus concentrations. To investigate this, we collected wastewater samples monthly during one year at eight different key sites at the municipal wastewater treatment plant in Gothenburg, Sweden. Virus particles were concentrated using ultracentrifugation, viral RNA was subsequently extracted, and transformed into cDNA by reverse transcription. The quantification was performed with real-time PCR assays for NoV genogroups I (GGI) and II (GGII), respectively. We found seasonal changes of NoV genogroups, with the highest concentration of NoV GGII during the winter months, and the highest concentration of NoV GGI during the summer months. Virus transmission in wastewater was more stable for NoV GGI, with NoV GGII demonstrating larger seasonal peaks. Virus reduction took place at similar rates in the primary settling, and in the activated sludge in combination with the secondary settling. Different physicochemical parameters and incoming virus concentrations were correlated to reduction of NoV between different treatment sites. This study gives new information about NoV transmission and virus reduction in a wastewater treatment plant.

Keyword

Wastewater treatment
Norovirus
Removal
Physicochemical parameters
real-time PCR
MEDICINE
MEDICIN

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