Recent News 22 : Phage-Mediated Dissemination of Virulence Determinants in Salmonella enterica: A Global Genomic Analysis and the Emergence of Bacterial Countermeasures

Phage-Mediated Dissemination of Virulence Determinants in Salmonella enterica : A Global Genomic Analysis and the Emergence of Bacterial Countermeasures Abstract The global health burden of Salmonella enterica , a leading agent of foodborne illness, continues to rise despite advances in detection, hygiene, and therapeutic interventions. Recent evidence points to an underappreciated yet crucial force in its evolution: bacteriophages. These viruses, long known for their roles in bacterial mortality and horizontal gene transfer, are now implicated in the worldwide dissemination of virulence factors that directly affect Salmonella pathogenicity, persistence, and host adaptation. A major international study, analyzing over 466,000 bacterial genomes and more than 5,000 phage sequences, reveals a dynamic virome acting as a conduit for the spread of key virulence genes. Unexpectedly, this study also uncovers an intrinsic genetic defense—centered on the bacterial csrA gene—that modulates ph...