FIG. 1.

Allelic profiles, ribotype patterns, sequence type (ST), ribotype (RT), source information, and MIC of ceftazidime (CAZ) and ciprofloxacin (CIP) of the 67 K. pneumoniae strains. The two first letters of the original strain name correspond to the code of the source medical center. Clinical sources were blood, respiratory tract (RTI), urinary tract (UTI), and soft tissue infections. Epidemiological clusters initially suspected on the basis of the medical center and susceptibility to CAZ (resistance breakpoint, 64 mg/liter) and to CIP (resistance breakpoint, 2 mg/liter) are indicated in the last column. All clinical strains were collected between 1997 and 2001. The UPGMA dendrogram was built from the pairwise distances between allelic profiles using BioNumerics.