FIG. 1.

Dendrogram showing the genetic relatedness of representative isolates from 6 MCGs and 19 mCGs based on the SmaI macrorestriction pattern of genomic DNA. The corresponding SCCmec genotypes, antibiograms, and the presence or absence of pvl features are presented next to the strain numbers. PFGE types and strain identification for each isolate are shown in the first column. The scale above the dendrogram shows the percentage of the similarity index among different strains. Strain numbers with asterisks represent SCCmec MRSA positive control or reference strains. The MRSA isolates belonging to MCGs and mCGs are demarcated by horizontal lines. Properties associated with CA-MRSA, HA-MRSA, and mCGs are in red, green, and blue, respectively. No bands indicates that no amplicons in the SCCmec multiplex assay were detected with the primers used in the present study. Abbreviations: CG, clonal group; ND, not determined; neg, negative; pos, positive; na, not available.