FIG 1.

Phylogenetic trees of STs of all of the strains (A) and of exoU-positive strains (B) and of STs, virulence genes, different regions, and infection sites (C). (A and B) Minimum spanning trees of STs as determined by MLST, colored by strains. The size of each node reflects the number of isolates contained within the same clade. Each color represents one isolate. (C) MLST types of all of the 182 INS-PA isolates are listed outside the circle. MLST types, regions, exoU-positive or -negative status, and infection sites are marked with different colors from outside to inside. MLST, multilocus sequence typing; IAI, intra-abdominal tract infection; RTI, respiratory tract infection; UTI, urinary tract infection; NEG, negative; POS, positive.