• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Elucidation of source and environmental behavior of antibiotic-resistant bacteria and resistance genes by microbial source tracking

Research Project

Project/Area Number 20H04357
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 64010:Environmental load and risk assessment-related
Research InstitutionKitasato University

Principal Investigator

Sei Kazunari  北里大学, 医療衛生学部, 教授 (80324177)

Co-Investigator(Kenkyū-buntansha) Amarasiri Mohan  北里大学, 医療衛生学部, 講師 (50815537)
亀井 樹  山梨大学, 大学院総合研究部, 助教 (80792168)
古川 隼士  北里大学, 医療衛生学部, 准教授 (90632729)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000)
Fiscal Year 2022: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2021: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥10,140,000 (Direct Cost: ¥7,800,000、Indirect Cost: ¥2,340,000)
Keywords薬剤耐性菌 / 薬剤耐性遺伝子 / ソーストラッキング
Outline of Research at the Start

下水処理場へ流入する各種排水、下水処理場流入水、下水処理場放流水、放流先河川の最上流部および放流地点直下、最下流部の水からARBを分離し、一般細菌数との比較からARB存在割合を求めるとともに、ARB分離株の保持するARGsをPCR法によって定性検出する。次いで、PFGE法を用いてARB分離株を遺伝子型に基づいて分類し、発生源を解明するとともに、分離されたARBが自然由来か下水処理水由来であるか評価する。さらに、培養法によってARBを計数、デジタルPCR法によってARGsを定量し、排水ごとの下水処理場へのARBおよびARGsの流入寄与率を推定する。また、下水処理水放流後の河川水中挙動を解明する。

Outline of Final Research Achievements

The goal of this research is to quantitatively elucidate the behavior of antibiotic-resistant bacteria (ARB) and resistance genes (ARGs) from their source to their release into the water environment via wastewater treatment plants (WWTPs). The objective was to accumulate basic data that would contribute to the elucidation of the source of ARB and ARGs entering WWTPs and the behavior of ARB and ARGs discharged from WWTPs in the water environment.
We investigated the existence of ARB and ARGs in hospital wastewater, WWTPs, and river water, and suggested that the effect of hospital wastewater on ARB entering WWTPs and the influence of WWTPs effluent on ARB in river water were not significant. Therefore, further analysis is needed to investigate the effect of horizontal gene transfer of ARGs on the occurrence of ARB and to broaden the study area such as livestock wastewater and fish farm wastewater.

Academic Significance and Societal Importance of the Research Achievements

研究成果の学術的意義は、これまで明らかになっていなかった下水処理場へ流入してくるARBの発生源と下水処理場から放流されたARBの水環境中挙動を明らかにした病院排水は必ずしも下水処理場におけるARBの主要な発生源とはなっておらず、下水処理場から流出したARBが必ずしも水環境中で優占的に存在していないことを明らかにした点にあると考えている。また、社会的意義としては、都市水環境を対象としたARBやARGsの発生源対策ならびにARBやARGsによる公衆衛生上の問題解決に資する基礎的データとなる成果が得られたものと考えている。これを実際の問題解決に繋げるためには、さらなる調査の継続が必要である。

Report

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

    (19 results)

All 2023 2022 2021

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (16 results) (of which Int'l Joint Research: 10 results)

  • [Journal Article] Concentration and reduction efficiency of vancomycin-resistant heterotrophic bacteria and vanA and vanB genes in each wastewater treatment unit processes2022

    • Author(s)
      Takashi Furukawa, Tohru Mekata, Mohan Amarasiri, and Kazunari Sei
    • Journal Title

      Journal of Global Antimicrobial Resistance

      Volume: 30 Pages: 340-347

    • DOI

      10.1016/j.jgar.2022.07.008

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Prevalence of antibiotic resistance genes (ARGs) in drinking and environmental water sources of the Kathmandu Valley, Nepal2022

    • Author(s)
      Mohan Amarasiri, Tsubasa Takezawa, Bikash Malla, Takashi Furukawa, Jeevan B. Sherchand, Eiji Haramoto, and Kazunari Sei
    • Journal Title

      Frontiers in Microbiology

      Volume: 13 Pages: 894014-894014

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Summary and Perspectives on Current Disinfection Technologies in Reducing Antibiotic Resistant Bacteria and Their Resistance Genes2022

    • Author(s)
      FURUKAWA TAKASHI、AMARASIRI MOHAN、UENO TAKAHISA、SEI KAZUNARI
    • Journal Title

      Japanese Journal of Water Treatment Biology

      Volume: 58 Issue: 1 Pages: 9-24

    • DOI

      10.2521/jswtb.58.9

    • ISSN
      0910-6758, 1881-0438
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 病院排水中における薬剤耐性遺伝子の水平伝播に影響を及ぼすインテグロン動態の解明2023

    • Author(s)
      山本智也, Mohan Amarasiri, 前花祥太郎, 古川隼士, 佐野大輔, 清和成
    • Organizer
      第57回日本水環境学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 神奈川県下の2ヶ所の下水処理場における流入水および放流水中の薬剤耐性菌と耐性遺伝子の存在実態調査2023

    • Author(s)
      金刺未来, Mohan Amarasiri, 古川隼士, 前花祥太郎, 清和成
    • Organizer
      第57回日本水環境学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 過酢酸、過ギ酸による下水二次処理水中の細胞外薬剤耐性遺伝子の不活化評価2023

    • Author(s)
      小林大起, Mohan Amarasiri, 古川隼士, 佐野大輔, 清和成
    • Organizer
      第57回日本水環境学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 相模川における薬剤耐性菌と薬剤耐性遺伝子の存在実態と耐性プロファイルの調査2023

    • Author(s)
      荻野瑞葵, 金刺未来, 亀井樹, Mohan Amarasiri, 古川隼士, 清和成
    • Organizer
      第57回日本水環境学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Disinfection of extracellular antimicrobial resistant genes (ARGs) using free chlorine (Cl), peracetic acid (PAA), and performed acid (PFA)2022

    • Author(s)
      Hiroki Kobayashi, Mohan Amarasiri, Takashi Furukawa, Daisuke Sano, and Kazunari Sei
    • Organizer
      Water and Environment Technology Conference 2022 (WET2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Abundance of antimicrobial resistant bacteria and their resistance profiles in Sagami river basin2022

    • Author(s)
      Mizuki Ogino, Miku Kanazashi, Shiori Kambara, Tatsuru Kamei, Mohan Amarasiri, Takashi Furukawa, and Kazunari Sei
    • Organizer
      Water and Environment Technology Conference 2022 (WET2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Investigation of antibiotic resistance genes in river water and household water in the Kathmandu Valley, Nepal2022

    • Author(s)
      Tsubasa Takezawa, Mohan Amarasiri, Takashi Furukawa, Bikash Malla, Eiji Haramoto, and Kazunari Sei
    • Organizer
      Water and Environment Technology Conference 2022 (WET2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Prevalence of antibiotic resistance genes in drinking and environmental water sources of the Kathmandu Valley, Nepal2022

    • Author(s)
      Tsubasa Takezawa, Mohan Amarasiri, Takashi Furukawa, Bikash Malla, Jeevan B. Sherchand, Eiji Haramoto, and Kazunari Sei
    • Organizer
      International Water Association World Water Congress & Exhibition 2022 (IWA World Water Congress & Exhibition 2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Disinfection of extracellular antibiotic resistance genes using peracetic acid (PAA) and performic acid (PFA)2022

    • Author(s)
      Hiroki Kobayashi, Mohan Amarasiri, Ryuji Ampo, Takashi Furukawa, Daisuke Sano, and Kazunari Sei
    • Organizer
      International Water Association World Water Congress & Exhibition 2022 (IWA World Water Congress & Exhibition 2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Identification of possible origins of ARB in river environments2022

    • Author(s)
      Mizuki Ogino, Miku Kanazashi, Shiori Kambara, Tatsuru Kamei, Mohan Amarasiri, Takashi Furukawa, and Kazunari Sei
    • Organizer
      6th International Symposium on the Environmental Dimension of Antibiotic Resistance (EDAR6)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Abundance of antimicrobial resistant bacteria and their resistance profiles in Sagami River basin2021

    • Author(s)
      Mizuki Ogino, Yukiko Kobayashi, Jo Yonemoto, Tatsuru Kamei, Mohan Amarasiri, Takashi Furukawa, and Kazunari Sei
    • Organizer
      Water and Environment Technology Conference 2021 (WET2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Abundance of antimicrobial resistant bacteria and their antimicrobial resistant profiles in hospital sewage2021

    • Author(s)
      Jo Yonemoto, Mizuki Ogino, Nagi Niida, Ryotaro Eda, Shotaro Maehana, Mohan Amarasiri, Takashi Furukawa, Hidero Kitasato, and Kazunari Sei
    • Organizer
      Water and Environment Technology Conference 2021 (WET2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Abundance of antimicrobial resistant bacteria and their resistance profiles in Sagami River basin2021

    • Author(s)
      Mizuki Ogino, Yukiko Kobayashi, Jo Yonemoto, Tatsuru Kamei, Mohan Amarasiri, Takashi Furukawa, and Kazunari Sei
    • Organizer
      The 13th International Joint Workshop on Advanced Engineering Technology for Environment and Energy (The 13th AETEE)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Abundance of antimicrobial resistant bacteria and their antimicrobial resistant profiles in hospital sewage2021

    • Author(s)
      Jo Yonemoto, Mizuki Ogino, Nagi Niida, Ryotaro Eda, Shotaro Maehana, Mohan Amarasiri, Takashi Furukawa, Hidero Kitasato, and Kazunari Sei
    • Organizer
      The 13th International Joint Workshop on Advanced Engineering Technology for Environment and Energy (The 13th AETEE)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 病院排水中の薬剤耐性菌の存在実態と耐性プロファイルの調査2021

    • Author(s)
      米本譲、荻野瑞葵、小林由紀子、新井田凪、江田諒太郎、前花祥太郎、Amarasiri Mohan、古川隼士、北里英郎、清和成
    • Organizer
      第55回日本水環境学会年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 相模川における薬剤耐性菌の存在実態と耐性プロファイルの調査2021

    • Author(s)
      荻野瑞葵、米本譲、小林由紀子、亀井樹、Amarasiri Mohan、古川隼士、清和成
    • Organizer
      第55回日本水環境学会年会
    • Related Report
      2020 Annual Research Report

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi