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Impact of COVID-19 Nonpharmaceutical Interventions on the Extent of Norovirus Contamination in Oyster Production Areas in Ireland during Winter 2020 to 2021.
Keaveney, Sinéad; Rupnik, Agnieszka; Fitzpatrick, Amy; Devilly, Leon; Fahy, James; Doré, Bill.
  • Keaveney S; Marine Institute, Rinville, Oranmore, County Galway, Ireland H91 R673.
  • Rupnik A; Marine Institute, Rinville, Oranmore, County Galway, Ireland H91 R673.
  • Fitzpatrick A; Marine Institute, Rinville, Oranmore, County Galway, Ireland H91 R673.
  • Devilly L; Marine Institute, Rinville, Oranmore, County Galway, Ireland H91 R673.
  • Fahy J; Marine Institute, Rinville, Oranmore, County Galway, Ireland H91 R673.
  • Doré B; Marine Institute, Rinville, Oranmore, County Galway, Ireland H91 R673.
J Food Prot ; 85(10): 1397-1403, 2022 10 01.
Article in English | MEDLINE | ID: covidwho-2024920
ABSTRACT
ABSTRACT A significant decrease in norovirus prevalence and concentration was observed in oyster production areas in Ireland during winter 2020 to 2021. Oyster production areas impacted by human wastewater discharges that had been undergoing norovirus surveillance since 2018 were investigated. Samples collected in the winter seasons of 2018 to 2019 and 2019 to 2020, prior to when the COVID-19 pandemic interventions were applied, showed a prevalence of 94.3 and 96.6%, respectively, and geometric mean concentrations of 533 and 323 genome copies per g, respectively. These values decreased significantly during the winter of 2020 to 2021 (prevalence of 63.2% and geometric concentration of below the limit of quantification), coinciding with the control measures to mitigate the transmission of severe acute respiratory syndrome coronavirus 2 of the genus Betacoronavirus. Divergence between norovirus GI and GII prevalence and concentrations was observed over the 3-year monitoring period. Norovirus GII was the dominant genogroup detected in winter 2020 to 2021, with over half of samples positive, although concentrations detected were significantly lower than prepandemic winters, with a geometric mean concentration of below the limit of quantification.
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Full text: Available Collection: International databases Database: MEDLINE Main subject: Ostreidae / Norovirus / COVID-19 Type of study: Experimental Studies / Observational study Limits: Animals / Humans Country/Region as subject: Europa Language: English Journal: J Food Prot Year: 2022 Document Type: Article

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Full text: Available Collection: International databases Database: MEDLINE Main subject: Ostreidae / Norovirus / COVID-19 Type of study: Experimental Studies / Observational study Limits: Animals / Humans Country/Region as subject: Europa Language: English Journal: J Food Prot Year: 2022 Document Type: Article