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Volume 11, Issue 3

Global phylogenomic analysis of reveals genomic and prophage diversity in multidrug-resistant lineages Open Access

Abstract

is the foremost cause of opportunistic canine skin and mucosal infections worldwide. Multidrug-resistant (MDR) and methicillin-resistant (MRSP) lineages have disseminated globally in the last decade and present significant treatment challenges. However, little is known regarding the factors that contribute to the success of MDR lineages. In this study, we compared the genome sequence of 110 UK isolates of with 2166 genomes of populations from different continents. A novel core genome multi-locus typing scheme was generated to allow large-scale, rapid and detailed analysis of phylogenies and was used to show that the population structure is broadly segregated into an MDR population and a non-MDR population. MRSP lineages are predicted to encode certain resistance genes either chromosomally or on plasmids, and this is associated with their MLST sequence type. A comparison of lineages most frequently implicated in disease, ST-45 and ST-71, with the phylogenetically related ST-496 lineage that has a comparatively low disease rate, revealed that ST-45 and ST-71 genomes encode distinct combinations of phage-defence systems and concurrently encode a high number of intact prophages. In contrast, ST-496 genomes encode a wider array of phage defence systems and lack intact and complete prophages. These findings indicate that MRSP lineages have significant structural genomic differences and that prophage integration and differential antiviral systems correlate with the emergence of successful genotypes.

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  • Accepted:
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Keyword(s): phage defence , prophage , pseudintermedius and Staphylococcus
© 2025 The Authors
  • This is an open-access article distributed under the terms of the Creative Commons Attribution License. This article was made open access via a Publish and Read agreement between the Microbiology Society and the corresponding author’s institution.
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2025-03-05
2025-12-17

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Global phylogenomic analysis of Staphylococcus pseudintermedius reveals genomic and prophage diversity in multidrug-resistant lineages
M Gen 11, 001369 (2025); https://doi.org/10.1099/mgen.0.001369
/content/journal/mgen/10.1099/mgen.0.001369
/content/journal/mgen/10.1099/mgen.0.001369
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