Comparative genomics analysis to explore the biodiversity and mining novel target genes of strains from different regions.

As a common foodborne pathogen, infection with poses a significant threat to human life and health. The objective of this study was to employ comparative genomics to unveil the biodiversity and evolutionary characteristics of strains from different regions, screening for potential target genes and mining novel target genes, thus providing significant reference value for the specific molecular detection and therapeutic targets of strains. Pan-genomic analysis revealed that from different regions have open genomes, providing a solid genetic basis for adaptation to different environments. These strains contain numerous virulence genes that contribute to their high pathogenicity. They also exhibit relatively high resistance to phosphonic acid, glycopeptide, lincosamide, and peptide antibiotics. The results of mobile genetic elements indicate that, despite being located in different geographical locations, there is a certain degree of similarity in bacterial genome evolution and adaptation to specific environmental pressures. The potential target genes identified through pan-genomics are primarily associated with the fundamental life activities and infection invasion of , including known targets such as , which can be utilized for molecular detection and therapeutic purposes. After screening a large number of potential target genes, we further screened them using hub gene selection methods to mining novel target genes. The present study employed eight different hub gene screening methods, ultimately identifying ten highly connected hub genes (), which play crucial roles in the pathogenesis of . The results of pan-genomic analysis showed that from different regions exhibit high similarity in bacterial genome evolution. The PCR results demonstrated the excellent specificity of the and genes for . Therefore, the and genes hold promise as specific molecular detection and therapeutic targets for strains from different regions.