Figure 1

PFGE pattern of MRSA isolates. Dendrogram resulting from the comparison of PFGE band restriction patterns of the three MRSA strains with the band patterns of prototype strains of USA300 and USA700 clones. The dendrogram was generated by the BioNumerics software (version 5.10, Applied Maths, Gent, Belgium). Patterns were clustered by UPGMA using the Dice similarity coefficient with an optimization of 0.50% and a tolerance of 1.3%. PFGE types (clusters) were defined based on a similarity of 80% or higher.