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2023 Fiscal Year Final Research Report

Establishment of a non-invasive diagnostic tool for fish diseases using environmental water

Research Project

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Project/Area Number 21K14901
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 40030:Aquatic bioproduction science-related
Research InstitutionEhime University

Principal Investigator

Takeuchi Hisato  愛媛大学, 南予水産研究センター, 助教 (80802157)

Project Period (FY) 2021-04-01 – 2024-03-31
Keywords魚病 / 養殖 / 環境DNA / 環境RNA / マダイ / エドワジエラ症
Outline of Final Research Achievements

This study aimed to establish a non-invasive diagnostic tool for fish disease using environmental water. We successfully detected red sea bream-derived messenger RNA (mRNA) in the rearing water of red sea bream, and found that the expression levels of mRNAs related to immune and inflammatory responses increased in the rearing water of fish infected with fish pathogenic bacteria. Furthermore, the expression of these mRNAs in fish tissues showed a similar trend to that observed in the rearing water. From these findings, it was considered that environmental RNA in rearing water could be utilized for fish disease diagnostic.

Free Research Field

魚病学

Academic Significance and Societal Importance of the Research Achievements

養殖場における魚病発生を早期に探知するためには、魚病検査を密に行うことが不可欠であるが、現行の検査方法は取り上げによる魚体へのダメージから養殖業者に敬遠されていた。本研究により、環境水中のRNAをマーカーとすることで、魚を取り上げることなく、非侵襲的に魚病検査を行える可能性が示された。このことは、水から魚体の病原体感染を知る手法の開発への一歩として、魚病検査や魚病学の発展に大きく貢献するものと期待される。

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Published: 2025-01-30  

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