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    Concentration of norovirus during wastewater treatment and its impact on oyster contamination

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    Flannery et al. 2012. Concentration ...
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    Author
    Flannery, John
    Keaveney, Sinéad
    Rajko-Nenow, Paulina
    O’Flaherty, Vincent
    Doré, William
    Keyword
    norovirus
    wastewater treatment
    seasonality
    oysters
    Date
    2012
    Publisher
    American Society for Microbiology
    
    Metadata
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    Abstract
    Concentrations of E. coli, FRNA bacteriophage, norovirus genogroup I (NoV GI) and II (NoV GII) in wastewater were monitored weekly over a one-year period at a wastewater treatment plant (WWTP) providing secondary treatment. A total of 49 samples of influent, primary and secondary-treated wastewater were analyzed. Using a real-time RT-qPCR, mean NoV GI and NoV GII concentrations detected in effluent wastewater were 2.53 and 2.63 log10 virus genome copies 100 ml-1 respectively. Mean NoV concentrations in wastewater during the winter period (January to March inclusive) (n=12) were 0.82 (NoV GI) and 1.41 (NoV GII) log units greater than mean concentrations for the rest of the year (n=37). The mean reduction of NoV GI and GII during treatment was 0.80 and 0.92 log units respectively with no significant difference detected in the extent of NoV reductions due to season. No seasonal trend was detected in the concentrations of E. coli or FRNA bacteriophage in wastewater influent and showed mean reductions of 1.49 and 2.13 log units respectively. Mean concentrations of 3.56 and 3.72 log10 virus genome copies 100 ml-1 for NoV GI and GII respectively were detected in oysters sampled adjacent to the WWTP discharge. A strong seasonal trend was observed and concentrations of NoV GI and GII detected in oyster were correlated with concentrations detected in the wastewater effluent. No seasonal difference was detected in concentrations of E. coli or FRNA bacteriophage detected in oysters.
    URI
    http://hdl.handle.net/10793/831
    Description
    NOTICE: this is the author’s version of a work that was accepted for publication in Applied and Environmental Microbiology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Applied and Environmental Microbiology, [Volume 78, No. 9 (May 2012)] doi: 10.1128/​AEM.07569-11
    peer-reviewed
    Citation
    Flannery J, Keaveney S, Rajko-Nenow P, O'Flaherty V, and Doré W. (2012) Concentration of Norovirus during Wastewater Treatment and Its Impact on Oyster Contamination. Applied and Environmental Microbiology, 78(9), pp 3400-3406. doi: 10.1128/​AEM.07569-11
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