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2023 Fiscal Year Final Research Report

In vivo analysis of gut microbiota which prevents the intestinal botulism

Research Project

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Project/Area Number 21H02729
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 49050:Bacteriology-related
Research InstitutionKanazawa University

Principal Investigator

Fujinaga Yukako  金沢大学, 医学系, 教授 (60252954)

Co-Investigator(Kenkyū-buntansha) 松村 拓大  金沢大学, 医学系, 准教授 (00456930)
小林 伸英  金沢大学, 医学系, 助教 (30712799)
Project Period (FY) 2021-04-01 – 2024-03-31
Keywordsボツリヌス菌 / Clostridium botulinum / 腸内細菌 / ボツリヌス症
Outline of Final Research Achievements

In this study, we compared the susceptibility of mice transplanted with various microbiota to C. botulinum infection. As a result, we identified a bacterial group responsible for colonization resistance against C. botulinum. Mice transplanted with the bacterial group extracted from human adult faeces showed resistance to the infection, confirming the protective effect of the bacterial group. Furthermore, a single bacterial strain enough to protect against C. botulinum infection was identified from the bacterial group. The results of this study expand our understanding of the pathogenesis of infant botulism.

Free Research Field

細菌学

Academic Significance and Societal Importance of the Research Achievements

乳児ボツリヌス症は、日本においては年間数例と比較的稀な疾患ではあるが、罹患した場合は、治療法が存在しない。本疾患の罹患リスクを下げるために、一歳未満の乳児には、ボツリヌス菌芽胞を含んでいる可能性が高いことで知られている蜂蜜の摂取を控えるといった予防法が採られているのみである。本感染症を抑制する腸内細菌が同定できれば、これまでに実現できなかった本疾患の根本的な予防法や治療法を確立するための鍵となる基礎的知見が得られる。

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Published: 2025-01-30   Modified: 2025-06-04  

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