Fig. 2
Minimum spanning tree by multilocus sequence type of S. aureus isolated from pigs or pig-associated environments. Each node within the tree represents a single sequence type. Node size is proportional to the number of genomes with that sequence type. Node color represents the country from which the strains were isolated. The branch length between each node indicates the number of allelic differences between the linked sequence types. Star indicates the sequence type related to the 15 isolates from this study.