FIG 4.

Minimum spanning tree displaying clustering indicative for transmission of LA-MRSA between index patients and contacts in Dutch health care settings. The tree was based on 6,461 SNV positions, and clustering was done using a categorical coefficient. Each node in this minimum spanning tree represents a single LA-MRSA isolate. Nodes with identical colors represent isolates from the same presumed transmission event. Circles with thicker lines represent isolates where transmission seems unlikely. The number of SNVs between isolates of the same presumed transmission is indicated adjacent to the line connecting the nodes in the minimum spanning tree.