Appendix File S1. Isolate metadata and plasmid-associated antimicrobial resistance profiles of Klebsiella pneumoniae strains recovered during the University Hospitals Dorset outbreak. The file contains isolate-level epidemiological and genomic information, including isolate identifiers, collection dates, hospital departments, specimen sources, sequence types, phenotypic antimicrobial-susceptibility classifications, plasmid carriage, and plasmid-encoded antimicrobial resistance genes. It documents the distribution of the outbreak-associated IncFIB(K) multidrug-resistance plasmid and its resistance determinants, including blaCTX-M-15, blaOXA-1, blaTEM-1B, aac(3)-IIe, aac(6′)-Ib-cr, strA, strB, dfrA14, qnrB1, sul2, and tet(A), among the sequenced isolates.