RT Journal Article T1 Ancient host-associated microbes obtained from mammoth remains A1 Guinet, Benjamin A1 Oskolkov, Nikolay A1 Moreland, Kelsey A1 Dehasque, Marianne A1 Chacón Duque, J. Camilo A1 Angerbjörn, Anders A1 Arsuaga Ferreras, Juan Luis A1 Danilov, Gleb A1 Kanellidou, Foteini A1 Kitchener, Andrew C. AB Ancient genomic studies have extensively explored human-microbial interactions, yet research on non-human animals remains limited. In this study, we analyzed ancient microbial DNA from 483 mammoth remains spanning over 1 million years, including 440 newly sequenced and unpublished samples from a 1.1-million-year-old steppe mammoth. Using metagenomic screening, contaminant filtering, damage pattern analysis, and phylogenetic inference, we identified 310 microbes associated with different mammoth tissues. While most microbes were environmental or post-mortem colonizers, we recovered genomic evidence of six host-associated microbial clades spanning Actinobacillus, Pasteurella, Streptococcus, and Erysipelothrix. Some of these clades contained putative virulence factors, including a Pasteurella-related bacterium that had previously been linked to the deaths of African elephants. Notably, we reconstructed partial genomes of Erysipelothrix from the oldest mammoth sample, representing the oldest authenticated host-associated microbial DNA to date. This work demonstrates the potential of obtaining ancient animal microbiomes, which can inform further paleoecological and evolutionary research. PB Elsevier SN 0092-8674 YR 2025 FD 2025-11-13 LK https://hdl.handle.net/20.500.14352/126307 UL https://hdl.handle.net/20.500.14352/126307 LA eng NO Guinet, B., Oskolkov, N., Moreland, K., Dehasque, M., Chacón-Duque, J. C., Angerbjörn, A., Arsuaga, J. L., Danilov, G., Kanellidou, F., Kitchener, A. C., Muller, H., Plotnikov, V., Protopopov, A., Tikhonov, A., Termes, L., Zazula, G., Mortensen, P., Grigorieva, L., Richards, M., … Van Der Valk, T. (2025). Ancient host-associated microbes obtained from mammoth remains. Cell, 188(23), 6606-6619.e24. https://doi.org/10.1016/j.cell.2025.08.003 DS Docta Complutense RD 31 dic 2025