Dendrogram of extended spectrum β-lactamase (ESBL)-producing
isolates belonging to ST131. Dendrogram based on XbaI macrorestriction patterns of EBSL-producing E. coli isolates belonging to ST131. The broken vertical lines indicate 80 % and 70 % similarity of PFGE profiles, respectively. aLocations of acquisition: HO, hospital-onset; CO, community-onset; CA, community-associated; MICU, medical intensive care unit; NSICU, neurosurgical intensive care unit; SICU, surgical intensive care unit; GW, general ward. bAntimicrobial resistance denotes antimicrobial agents to which E. coli isolates were non-susceptible, apart from penicillin and cephalosporin: SXT, trimethoprim-sulfamethoxazole; CIP, ciprofloxacin; T, tobramycin; G, gentamicin, A, amikacin; PTX, pipercillin-tazobactam.