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  • Title: Use of coliphages to investigate norovirus contamination in a shellfish growing area in Republic of Korea.
    Author: Cho K, Lee C, Park S, Kim JH, Choi YS, Kim MS, Koo ES, Yoon HJ, Kang JH, Jeong YS, Choi JD, Ko G.
    Journal: Environ Sci Pollut Res Int; 2018 Oct; 25(30):30044-30055. PubMed ID: 30076551.
    Abstract:
    A number of severe norovirus outbreaks due to the consumption of contaminated shellfish have been reported recently. In this study, we evaluated the distribution of coliphage densities to determine their efficacy as fecal indicators of enteric viruses, including noroviruses, in water samples collected from a shellfish growing area in Republic of Korea over a period of approximately 1 year. Male-specific and somatic coliphages in water samples were analyzed using the single agar layer method, and norovirus genogroups I and II, which infect mainly humans, were analyzed using duplex reverse transcription quantitative PCR. Male-specific and somatic coliphages were detected widely throughout the study area. Several environmental parameters, including salinity, precipitation, temperature, and wind speed were significantly correlated with coliphage concentrations (P < 0.05). Moreover, the concentrations of male-specific coliphages were positively correlated with the presence of human noroviruses (r = 0.443; P < 0.01). The geospatial analysis with coliphage concentrations using a geographic information system revealed that densely populated residential areas were the major source of fecal contamination. Our results indicate that coliphage monitoring in water could be a useful approach to prevent norovirus contamination in shellfish.
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