Figure 1

PFGE-based dendrogram and antimicrobial resistance profile of the 23 isolates from the same hospital in Xiamen, Fujian, China. The dendrogram was constructed based on unweighted pair-group method using average linkages and pairwise Dice coefficients. Antimicrobial susceptibility was performed by disk fusion, black indicates resistance; gray indicates intermediate; white indicates susceptible. Antibiotics are tetracycline (TE), ceftazidime (CAZ), cefepime (FEP), trimethoprim/sulfamethoxazole (SXT), aztreonam (SAM), imipenem (IPM), piperacillin (PRL), ciprofloxacin (CIP), cefotaxime (CTX) and gentamicin (CN). The strain number, isolate date, species and NDM-1 phenotype of the strains are shown.