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Does microbiota in the bed environment cause pressure injury infection: a new paradigm of wound infection mechanism

Research Project

Project/Area Number 18K19669
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 58:Society medicine, nursing, and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

Nakagami Gojiro  東京大学, 大学院医学系研究科(医学部), 准教授 (70547827)

Co-Investigator(Kenkyū-buntansha) 真田 弘美  東京大学, 大学院医学系研究科(医学部), 教授 (50143920)
峰松 健夫  東京大学, 大学院医学系研究科(医学部), 特任准教授 (00398752)
須釜 淳子  金沢大学, 新学術創成研究機構, 教授 (00203307)
大貝 和裕  金沢大学, 保健学系, 准教授 (40706983)
Project Period (FY) 2018-06-29 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywords細菌叢 / 次世代シーケンス / 難治性創傷 / 褥瘡 / マイクロバイオーム / 皮膚常在細菌叢 / ディスバイオーシス / バイオフィルム / 寝床環境 / 嫌気性菌 / 感染 / クリティカルコロナイゼーション
Outline of Final Research Achievements

To prevent pressure injury infection, we focused on the bed environment as a source of wound bacteria. In this study, we investigated the bacterial flora in the bed environment of a patient with the infected pressure injury, a patient with the non-infected pressure injury, and a patient without pressure injuries, and examined the changes in diversity and composition over time. Next, in Study 2, we investigated the relationship between wound healing process and the similarity of bacterial flora between the wound and periwound skin in patients with severe pressure injuries. The results showed that the bed environment is a source of wound microflora, that the presence of pressure injuries may affect the microbiota of the bed environment (Study 1), and that the wound microbiota of hard-to-heal wounds differs from the skin microflora of the periwound skin (Study 2). These results indicate that the bacterial flora in the bed environment may contribute to pressure injury infection.

Academic Significance and Societal Importance of the Research Achievements

褥瘡(床ずれ)は依然として多く発生しており、一部の褥瘡は感染してしまうことがあります。感染すると治療に難渋することからその予防が重要です。しかし、なぜ褥瘡感染が発生してしまうかの詳細なメカニズムはわかっていません。今回の研究では、ベッドや布団など、褥瘡患者さんが寝ている環境中にある細菌が創部に移行して特殊な細菌叢(集団を構成する細菌の種類)が形成されるのではないかと仮説を立て、臨床研究を実施しました。その結果、寝床環境中の細菌叢が創部に移行して、創部感染を引き起こしている可能性が示唆されました。したがって、創部の細菌叢をコントロールするとともに、寝床環境へのアプローチも重要といえます。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (8 results)

All 2020 2019 Other

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (6 results) (of which Int'l Joint Research: 3 results) Remarks (1 results)

  • [Journal Article] Temporal changes in the diversity and composition of the bed microbiota of patients with pressure ulcers2020

    • Author(s)
      Kunimitsu Mao, Nakagami Gojiro, Kitamura Aya, Minematsu Takeo, Koudounas Sofoklis, Ogai Kazuhiro, Sugama Junko, Takada Chika, Sanada Hiromi
    • Journal Title

      Journal of Japanese Society of Wound, Ostomy and Continence Management

      Volume: 24 Issue: 4 Pages: 366-378

    • DOI

      10.32201/jpnwocm.24.4_366

    • NAID

      130007962341

    • ISSN
      1884-2321, 1884-233X
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 重度褥瘡の治癒傾向と創部細菌叢の関連に関する予備的検討2020

    • Author(s)
      國光 真生, 仲上 豪二朗, 北村 言, 峰松 健夫, 大貝 和裕, 須釜 淳子, 真田 弘美.
    • Organizer
      第22回日本褥瘡学会学術集会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Investigation of the dissemination of microbiota across the bed environment.2019

    • Author(s)
      Kunimitsu Mao, Nakagami Gojiro, Minematsu Takeo, Kitamura Aya, Mugita Yuko, Ogai Kazuhiro, Sugama Junko, Takada Chika, Sanada Hiromi
    • Organizer
      28th Japanese Society of Wound, Ostomy and Continence Management conference
    • Related Report
      2019 Research-status Report
  • [Presentation] Investigating the dissemination of microbiota between pressure ulcer and bed environment.2019

    • Author(s)
      Kunimitsu, Gojiro Nakagami, Takeo Minematsu, Aya Kitamura, Hiromi Sanada.
    • Organizer
      EPUAP2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Effect of the use of antiseptics on the dysbiosis of pressure ulcers microbiota2019

    • Author(s)
      Kunimitsu Mao, Sanada Hiromi, Nakagami Gojiro, Kitamura Aya, Minematsu Takeo, Ogai Kazuhiro, Sugama Junko.
    • Organizer
      The 8th Asia Pacific Enterostomal Therapy Nurse Association
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Biofilm differentially affects wound healing according to the bacterial community in pressure ulcers.2019

    • Author(s)
      Gojiro Nakagami, Mao Kunimitsu, Aya Kitamura, Takeo Minematsu, Hiromi Sanada.
    • Organizer
      EPUAP2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 國光 真生, 仲上 豪二朗, 北村 言, 峰松 健夫, 大貝 和裕, 須釜 淳子, 真田 弘美.2019

    • Author(s)
      褥瘡患者の創部細菌叢と寝床環境中の細菌叢の関連評価.
    • Organizer
      第7回看護理工学会学術集会
    • Related Report
      2019 Research-status Report
  • [Remarks] 東京大学大学院医学系研究科 健康科学・看護学専攻 老年看護学/創傷看護学分野

    • URL

      http://www.rounenkango.m.u-tokyo.ac.jp/

    • Related Report
      2020 Annual Research Report 2019 Research-status Report 2018 Research-status Report

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Published: 2018-07-25   Modified: 2022-01-27  

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