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2023 Fiscal Year Final Research Report

Research on adhesion factors of Campylobacter to chicken skin and their biological significance

Research Project

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Project/Area Number 21K05921
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 42020:Veterinary medical science-related
Research InstitutionUniversity of Miyazaki

Principal Investigator

Misawa Naoaki  宮崎大学, 産業動物防疫リサーチセンター, 特別教授 (20229678)

Project Period (FY) 2021-04-01 – 2024-03-31
Keywordsカンピロバクター / 鶏肉 / 付着因子 / 食中毒
Outline of Final Research Achievements

When chickens carrying the foodborne pathogen Campylobacter jejuni are brought into a processing plant, the chickens are contaminated with the bacteria. This research project aims to elucidate non-protein attachment factors on the bacterial side involved in the adhesion of C. jejuni to the chicken skin. We compared the adhesion of C. jejuni strains deficient in capsules (kpsM), phospholipids (pldA), and flagella (flaAB). The number of bacteria adhering to the skin of the capsular-deficient strain (kpsM- and pldA-) was significantly lower than that of the wild-type strain and non-flagellated mutant. Furthermore, when the adherence of the wild strain was examined after the capsules of the wild strain were applied to the skin, the adherence of the wild strain decreased in a concentration-dependent manner. Thus, it was suggested that the capsules of C. jejuni are an adhesion factor for chicken skin.

Free Research Field

獣医公衆衛生学

Academic Significance and Societal Importance of the Research Achievements

カンピロバクターの鶏肉に対する汚染機序として、皮膚と菌体外膜の構成因子間の特異的な付着機序の存在に着目した研究はない。 なぜ鶏肉が本菌によって高率に汚染されているかを新たな視点で解明する点が本研究課題の学術的独自性と創造性を有する研究テーマである。さらに、本菌と食鳥と体皮膚の付着機序が明らかにされ、皮膚への付着を制御する技術開発に繋がれば、食鳥処理場のカンピロバクター汚染の低減が期待できる。特に、殺菌剤を用いないカンピロバクターの新たな制御法に繋がる可能性を有している。より安全な食鳥肉の生産に貢献し、ひいてはヒトにおけるカンピロバクター食中毒のリスク低減への寄与が期待できる。

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Published: 2025-01-30  

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