ArticleScientific reports2026
Uncovering the genomic landscape of Mycobacterium bovis in Wales.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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10 authors.
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Abstract
Bovine tuberculosis (bTB), caused by the bacterium Mycobacterium bovis, is one of the most pressing animal health issues in Wales today. It negatively impacts cattle health, affects profitability and trade, and can decimate years of genetic improvement towards desirable production traits. It also imposes substantial financial, social, and psychological burdens on farming communities. Eradication of bTB requires an understanding of local transmission pathways to target effective disease-control interventions. In this study, we characterised the genomic diversity of M. bovis across Wales by analysing the genome sequence of 379 M. bovis isolates obtained from culture-positive animals in Wales in 2021. Analyses uncovered three prevalent clusters that are geographically distinct. A further three clusters containing fewer isolates were also geographically separated, two of which had particularly large SNP distances from most other Welsh isolates, suggesting independent introductions of M. bovis strains that are not endemic to Wales. Fine-scale and epidemiologically relevant genetic structuring was identified within the six main clusters, indicating region-specific evolution, which can drive local disease dynamics. Finally, SNPs were identified in coding genes that have the potential for important advantageous physiological consequences that may impact host-pathogen interactions and necessitate further investigation.
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