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Principal component analysis plot comparing plasmid composition (all plasmid contigs) of strains of Salmonella enterica serovar Paratyphi B variant Java sequence type 28. Oval rings indicate clusters I–IV. All clusters grouped strains from Europe and Latin America and were associated with IncI1 plasmids (cluster I), IncHI2 (cluster II), COLRNAI (cluster III), and combinations of IncI1 and IncHI2 plasmids (cluster IV).
