Clustering analysis of MLVA data for 55 selected isolates and 8 reference strains. All the CC30, CC8, CC1, CC7, CC15 and CC22 isolates cluster in this first part (genotype 1 to 60) of a dendrogram constructed from MLVA-14 testing of 116 isolates and 12 reference strains. One isolate of a given genotype was selected for each patient to produce the dendrogram (consequently some patients are represented by more than one strain). On the right are shown the patient code, the name of the selected isolate, the spa repeat code, the spa type, the methicillin (oxacillin) resistance status, the presence (y) or absence (n) of mecA, the number of isolates of identical genotype, the genotype number. The names of MLST clonal complexes are indicated on the left. Each cluster of two or more isolates is shown with a different coloured square using the same colour code as in Figure 1.