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Molecular epidemiology and resistance mechanism of carbapenem-resistant Enterobacter cloacae

Research Project

Project/Area Number 16K09931
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Infectious disease medicine
Research InstitutionNagoya University

Principal Investigator

Yagi Tetsuya  名古屋大学, 医学系研究科, 教授 (70333573)

Research Collaborator IGUCHI mitsutaka  
TOMITA yuuka  
KATO daizo  
MORIOKA hiroshi  
TETSUKA nobuyuki  
INAGAKI takayuki  
HIRABAYASHI aki  
SUZUKI hitoshi  
SHIBAYAMA keigo  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsカルバペネマーゼ産生腸内細菌科細菌 / Enterobacter cloace / IMP-1 / インテグロン / IncHI2A / カルバペネム耐性腸内細菌科細菌 / E. cloacae complex / MLST / カルバペネマーゼ / K. pneumoniae / カルバペネム耐性 / Enterobacter cloacae / IMP-60 / 感染症 / 薬剤耐性菌
Outline of Final Research Achievements

Thirty-nine carbapenem-resistant Enterobacter cloacae complex (CRECC) isolates recovered in Nagoya University Hospital from 2012 to 2016. Twenty out of 39 CRECC were carbapenemase-producing (CP) ECC. Molecular epidemiologic analysis with MLST and Rep-PCR showed ST53 (6 strains), ST113 (7 strains), ST513 (2 strains) among CPE strains were genetically closely-related. Whole genome sequencing analysis of plasmids from seven representative CPE strains revealed that they all had similar structure of plasmid with class I integron containing IMP-1 gene and IncHI2A replicon type.
Eighty-two ECC isolates, which were suspected to produce carbapenemase, were collected from 24 hospitals participated in an regional network in Aichi prefecture from 2014 to 2016. Eighteen out of 82 isolates, which were recovered from 4 hospitals, were shown to be IMP-1 producers. MLST analysis revealed that CPECC isolates with same ST were identified in the specific hospitals, and rarely seen beyond one hospital.

Academic Significance and Societal Importance of the Research Achievements

我が国でカルバペネム耐性腸内細菌科細菌の中で、最も検出の多いE. cloacae complexでのCPEの疫学を明らかにした。CPEの方が非産生菌より施設内で水平伝播しやすいことが初めて示唆された。分子疫学的解析では、これまでに報告のあるSTとは異なるSTの株も見出され、STが異なっていても、構造が類似したIMP-1遺伝子のあるクラスIインテグロンを持つIncHI2Aプラスミドを持っていることが明らかになった。
愛知県下の多施設連携サーベイランスでもCPEは検出されていたが、施設を超えたクローンの伝播は見られなかった。菌の分子疫学的解析を含めた地域連携サーベイランスの重要性が示された。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (12 results)

All 2019 2018 2017 2016

All Journal Article (4 results) (of which Peer Reviewed: 1 results) Presentation (8 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Active surveillance in response to the identification of a single carbapenemase-producing Escherichia coli at a Japanese university hospital2018

    • Author(s)
      Kato Daizo、Morioka Hiroshi、Tomita Yuka、Iguchi Mitsutaka、Hirabayashi Aki、Tetsuka Noriyuki、Sadomoto Takuya、Hyodo Miyuki、Mochizuki Mariko、Osada Yukari、Yamamoto Masato、Kato Yoshiaki、Inagaki Takayuki、Ichikawa Kazuya、Yagi Tetsuya
    • Journal Title

      Journal of Infection and Chemotherapy

      Volume: 24 Issue: 12 Pages: 1013-1015

    • DOI

      10.1016/j.jiac.2018.05.013

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] CRE(カルバペネム耐性腸内細菌科細菌)2018

    • Author(s)
      八木哲也
    • Journal Title

      Modern Physician

      Volume: 38 Pages: 229-232

    • Related Report
      2017 Research-status Report
  • [Journal Article] カルバペネム耐性腸内細菌科細菌(CRE)2018

    • Author(s)
      井口光孝,八木哲也
    • Journal Title

      月間薬事 1月臨時増刊号

      Volume: 60 Pages: 157-165

    • Related Report
      2017 Research-status Report
  • [Journal Article] カルバペネム耐性腸内細菌科細菌について2016

    • Author(s)
      八木哲也
    • Journal Title

      HosCom

      Volume: 13 Pages: 1-7

    • Related Report
      2016 Research-status Report
  • [Presentation] Molecular epidemiology and acquisition risk factor of carbapenemase-producing Enterobacter cloacae complex.2019

    • Author(s)
      Nobuyuki Tetsuka,Mitsutaka Iguchi,Akane Matsumoto,Keisuke Oka,Hiroshi Morioka Yuka Tomita,Tetsuya Yagi
    • Organizer
      第93回日本感染症学会総会・学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 愛知県内のカルバペネマーゼ産生腸内細菌科細菌の動向調査(第一報) 疫学2018

    • Author(s)
      井口光孝 、原 祐樹、手塚宜行 、森岡 悠 、平林亜希、冨田ゆうか、加藤大三 、八木哲也
    • Organizer
      第92回日本感染症学会学術講演会 第66回日本化学療法学会総会 合同学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 愛知県内のカルバペネマーゼ産生腸内細菌科細菌の動向調査(第二報) 遺伝子解析2018

    • Author(s)
      原 祐樹、井口光孝 、手塚宜行 、森岡 悠 、平林亜希、冨田ゆうか、加藤大三 、八木哲也
    • Organizer
      第92回日本感染症学会学術講演会 第66回日本化学療法学会総会 合同学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] カルバペネム耐性腸内細菌科細菌2018

    • Author(s)
      八木哲也
    • Organizer
      第29回日本臨床微生物学会総会・学術集会
    • Related Report
      2017 Research-status Report
  • [Presentation] 我が国におけるCRE/CPEの感染対策はどうあるべきか2018

    • Author(s)
      八木哲也
    • Organizer
      第33回日本環境感染学会総会・学術集会
    • Related Report
      2017 Research-status Report
  • [Presentation] Trend of antimicrobial resistance in Japan2017

    • Author(s)
      八木哲也
    • Organizer
      第28回日本臨床微生物学会総会・学術集会
    • Place of Presentation
      長崎ブリックホール(長崎県長崎市)
    • Year and Date
      2017-01-20
    • Related Report
      2016 Research-status Report
  • [Presentation] Molecular epidemiology of carbapenem-resistant Enterobacter cloacae in a University Hospital in Japan.2017

    • Author(s)
      Tetsuka N, Iguchi M, Morioka H, Tomita Y, Yagi T.
    • Organizer
      IDWeek2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Early implementation of active surveillance on detection of carbapenemase-producing Enterobacteriaceae2017

    • Author(s)
      Yagi T, Iguchi M, Tetsuka N, Morioka H, Matsumoto A, Kato H, Tomita Y.
    • Organizer
      IDWeek2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research

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Published: 2016-04-21   Modified: 2020-03-30  

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