先史時代の歯を用いて感染症の歴史的地図を作成(Prehistoric teeth used to create historic map of infectious diseases)

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2025-07-29 オックスフォード大学

オックスフォード大学などの国際研究チームは、ユーラシア各地の先史人類の歯や骨から抽出した古代DNAを解析し、3万7千年にわたる感染症の歴史をマッピングした。1,313体から214種の病原体を検出し、特に家畜化が進んだ約6,500年前から人獣共通感染症が急増したことが判明。5,000年前には遊牧民の移動とともに感染が拡大していた。最古のペストやジフテリア菌のDNAも確認され、感染症進化の理解や将来のワクチン開発に貢献が期待される。

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古代ユーラシアにおけるヒト病原体の時空間分布 The spatiotemporal distribution of human pathogens in ancient Eurasia

Martin Sikora,Elisabetta Canteri,Antonio Fernandez-Guerra,Nikolay Oskolkov,Rasmus Ågren,Lena Hansson,Evan K. Irving-Pease,Barbara Mühlemann,Sofie Holtsmark Nielsen,Gabriele Scorrano,Morten E. Allentoft,Frederik Valeur Seersholm,Hannes Schroeder,Charleen Gaunitz,Jesper Stenderup,Lasse Vinner,Terry C. Jones,Björn Nystedt,Karl-Göran Sjögren,Julian Parkhill,Lars Fugger,Fernando Racimo,Kristian Kristiansen,Astrid K. N. Iversen & Eske Willerslev
Nature  Published:09 July 2025
DOI:https://doi.org/10.1038/s41586-025-09192-8

先史時代の歯を用いて感染症の歴史的地図を作成(Prehistoric teeth used to create historic map of infectious diseases)

Abstract

Infectious diseases have had devastating effects on human populations throughout history, but important questions about their origins and past dynamics remain1. To create an archaeogenetic-based spatiotemporal map of human pathogens, we screened shotgun-sequencing data from 1,313 ancient humans covering 37,000 years of Eurasian history. We demonstrate the widespread presence of ancient bacterial, viral and parasite DNA, identifying 5,486 individual hits against 492 species from 136 genera. Among those hits, 3,384 involve known human pathogens2, many of which had not previously been identified in ancient human remains. Grouping the ancient microbial species according to their likely reservoir and type of transmission, we find that most groups are identified throughout the entire sampling period. Zoonotic pathogens are only detected from around 6,500 years ago, peaking roughly 5,000 years ago, coinciding with the widespread domestication of livestock3. Our findings provide direct evidence that this lifestyle change resulted in an increased infectious disease burden. They also indicate that the spread of these pathogens increased substantially during subsequent millennia, coinciding with the pastoralist migrations from the Eurasian Steppe4,5.

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