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Application of environmental DNA (eDNA) technique for determination of Opistorchiasis infection risks

Research Project

Project/Area Number 20H04346
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 63040:Environmental impact assessment-related
Research InstitutionNiigata University

Principal Investigator

SATO MEGUMI  新潟大学, 医歯学系, 研究教授 (70601813)

Co-Investigator(Kenkyū-buntansha) 源 利文  神戸大学, 人間発達環境学研究科, 教授 (50450656)
オオタケサトウ マルセロ  新潟薬科大学, 医療技術学部, 教授 (50771896)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2022: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2021: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2020: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
Keywordsタイ肝吸虫 / 環境DNA / ラオス
Outline of Research at the Start

吸虫の一つであるタイ肝吸虫(Ov)は、その生活史において、2つの中間宿主を必要とし、その間、水中で過ごす。終宿主から糞便と共に排出された虫卵が水中に入り、第一中間宿主の貝に入り成長したのち遊出し、第二中間宿主のコイ科の魚の中で感染型に成長し、ヒトはその魚を生で食べる事でOvに感染する。環境中(水中)でOvを検出することができれば、今までにない新しいOv感染リスク評価ができるようになる。我々のチームで構築した環境DNA手法を使用し、Ov蔓延地域においてリスクのある水域の評価を行うことにより、現地の人々が実施可能な具体的な感染症対策を提言することを目標としている。

Outline of Final Research Achievements

The liver fluke Opisthorchis viverrini (Ov) requires two intermediate hosts in its life cycle, during which time OV spends time in water body. Eggs excreted in feces from the definitive host enter the water, enter the first intermediate host; Bithynia snails, and then cercariae will be released. Cercriae goes into second intermediate host; cyprinid fishes, and becamoes infectious stages; metacercariae. People can be infected with Ov by eating raw sedonc intermidiate fishes with OV metacericariae. If Ov DNA can be detected in the environment (water), we will be able to conduct a new type of Ov infection risk assessment. In this study, we improved the Ov eDNA detection system which were developed previously by our team, and apply it at Ov prevalent areas. Thereby the local people can implement new countermeasures to prevent OV infection.

Academic Significance and Societal Importance of the Research Achievements

環境DNA手法は、遺伝子学的手法を用い生物の多様性と分布を調べることのできる、応用範囲の広い手法である。環境DNA手法を用いてタイ肝吸虫、住血吸虫などの蠕虫類またその中間宿主を水試料中にて検出することは公衆衛生学上でも新しい取り組みであり、画期的な領域である。環境DNA法は汚染されたまたは安全な水源を特定するためにも有用で、エコ疫学研究において非常に重要なツールである。医学を中心とした感染症の取り組みではヒトが対象とされる場合が多い。しかし、感染症への取り組は多面的なアプローチが必要なことが多く、環境DNA手法を用いた感染リスク評価は今後の感染症対策の一つとなりえる。

Report

(4 results)
  • 2023 Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (9 results)

All 2024 2023 2022 Other

All Int'l Joint Research (2 results) Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (5 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results) Book (1 results)

  • [Int'l Joint Research] Mahidol Univ., Fac. Tropical Medicine(タイ)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Savannakhet Health Dept.(ラオス)

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Ov-RPA-CRISPR/Cas12a assay for the detection of Opisthorchis viverrini infection in field-collected human feces2024

    • Author(s)
      Phuphisut Orawan、Poodeepiyasawat Akkarin、Yoonuan Tippayarat、Watthanakulpanich Dorn、Thawornkuno Charin、Reamtong Onrapak、Sato Megumi、Adisakwattana Poom
    • Journal Title

      Parasites & Vectors

      Volume: 17 Issue: 1 Pages: 80-80

    • DOI

      10.1186/s13071-024-06134-7

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] ジョイントシンポジウム3 「人獣共通感染症研究の魅力と今後の展望」2023

    • Author(s)
      サトウ 恵
    • Organizer
      第97回日本感染症学会総会・学術講演会・第71回日本化学療法学会学術集会 合同学会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Ecoepidemiology of opisthorchiasis in Savannakhet-Lao PDR using the eDNA approach2023

    • Author(s)
      Megumi Sato1, Riko Matsuo, Natsumi Kihara, Phpyphailin Prasayasith, Tippayarat Yoonuan, Poom Adisakwattana, Tiengkham Pongvongsa, Toshifumi Minamoto, Marcello Otake Sato
    • Organizer
      Joint International Tropical Medicine Meeting 2023
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Detection of Opisthorchis viverrini by using environmental DNA2022

    • Author(s)
      Riko Matsuo, Megumi Sato, Marcello Otake Sato, Toshifumi Minamoto
    • Organizer
      International Congress of Tropical Medicine and Malaria 2021
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Detection of Opisthorchis viverrini by using environmental DNA2022

    • Author(s)
      Riko Matsuo, Megumi Sato, Marcello Otake Sato, Poom Adisakwattana, Orawan Phuphisut, Tippayarat Yoonuan, Yanin Limpanont, Yupa Chusongsang, Paporn Poodeepiyasawat, Toshifumi Minamoto
    • Organizer
      International Congress of Tropical Medicine and Malaria 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ENVIRONMENTAL DNA AND RISK MAPPING2022

    • Author(s)
      Marcello Otake Sato, Megumi Sato, Yasuhito Sako
    • Organizer
      15th International Congress of Parasitology
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Book] Zoonotic Diseases and One Health2023

    • Author(s)
      Marcello Otake Sato, Megumi Sato, Poom Adsakwattana, IF Ian Kendrich Fontanilla
    • Total Pages
      182
    • Publisher
      MDPI Books
    • ISBN
      9783039280117
    • Related Report
      2022 Annual Research Report

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Published: 2020-04-28   Modified: 2025-01-30  

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