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2023 Fiscal Year Final Research Report

Development of on-site metagenomic typing methods for pathogenic microorganisms

Research Project

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Project/Area Number 20K20616
Research Category

Grant-in-Aid for Challenging Research (Pioneering)

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

Principal Investigator

Nakamura Shota  大阪大学, 微生物病研究所, 准教授 (90432434)

Project Period (FY) 2020-07-30 – 2024-03-31
Keywords感染症 / メタゲノミクス / 病原細菌 / 抗酸菌 / 微生物
Outline of Final Research Achievements

This study aims to develop a metagenomic typing method that can be analyzed on-site at an infectious disease outbreak to achieve comprehensive pathogen identification. We used the portable sequencing devices from Oxford Nanopore Technologies and constructed a cloud computing system for the identification of Non-tuberculous Mycobacterium. This effort led to the discovery of a novel species, Mycobacterium senriense, from a case that could not be identified by conventional methods and the establishment of MGIT-seq methodology which demonstrated 99.1% accuracy at the species level and 84.5% accuracy at the subspecies level.

Free Research Field

感染症内科学

Academic Significance and Societal Importance of the Research Achievements

感染症対策の初動の基本は病原体同定であり、究極的な病原体同定手法としては感染症が発生しているその場所で、あらゆる病原体の同定を行うことが望ましい。そこで新たにポータブル型の次世代シークエンス技術による非結核性抗酸菌(NTM)の同定システムの構築を行った。本研究成果で得られた方法論であるMGIT-seqは菌種レベルの同定において99.1%の精度を示し、84.5%を亜種レベルで同定した。このMGIT-seqは、非結核性抗酸菌の網羅的な種同定を達成し、臨床現場における単一の検査による亜種同定と肺NTM症治療戦略の決定に適用できる可能性がある。

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Published: 2025-01-30  

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