NOROVIRUS CONTAMINATION OF WILD SHELLFISHES IN AN ESTUARY RECEIVING TREATED MUNICIPAL WASTEWATER

DOI Web Site 6 References
  • ITO Erika
    岩手大学 大学院連合農学研究科地域環境創生学専攻
  • ITO Hiroaki
    山形大学 農学部食料生命環境学科
  • NISHIYAMA Masateru
    山形大学 農学部食料生命環境学科
  • KONTA Yoshimitsu
    東北大学 東北大学未来科学技術共同研究センター（NICHe）
  • OMURA Tatsuo
    東北大学 東北大学未来科学技術共同研究センター（NICHe）
  • WATANABE Toru
    山形大学 農学部食料生命環境学科

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Other Title
  • 下水処理水放流先に自生する二枚貝のノロウイルス汚染
  • ゲスイ ショリスイ ホウリュウサキ ニ ジセイ スル ニマイガイ ノ ノロウイルス オセン

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Abstract

 Wild oysters and clams were collected at an estuary receiving treated municipal wastewater in Sendai city from two municipal wastewater treatment plants between October 2017 and February 2018 and then examined for Norovirus in their digestive tissues. Norovirus was detected from both oysters (2.2log copies/ g-DT) and clams (2.5log copies/ g-DT) even before the epidemic of gastroenteritis. The concentration of Norovirus GII in the samples obviously increased during the epidemic, while such an increase was not found for Norovirus GI. The concentration of Norovirus GII in the shellfish samples was significantly correlated with the number of gastroenteritis patients reported in the city. This result indicates that reduction of gastroenteritis patients in the city can contribute to improved safety of shellfishes harvested at the downstream.

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