Figure 2.

Relationship between spa types of MSSA and MRSA isolates in this study. Node size is proportional to spa type frequency and line length is proportional to the number of mutational steps between the types. The node distances between the spa types was calculated by minimum spanning tree method using Dice correlation (BioNumerics v.7.1.). Based on the default setting of 1%, distance intervals are created that are converted into distance units. For example two entries when having a similarity of 99.6% will have a distance of 0 (interval 100–99% = distance 0). Two entries that have a similarity of 98.7% will have a distance of 1 (interval 99–98% = distance 1).