Fig. 5From: Longitudinal study of Staphylococcus aureus colonization and infection in a cohort of swine veterinarians in the United StatesGenetic relatedness of S. aureus isolates from swine (n = 1193) and veterinarians (n = 1659). Each node in this minimum spanning tree depicts one of 38 spa types identified from swine and swine veterinarians. The size of circles denotes the number of isolates. Swine isolates and vet isolates are color coded with orange and green, respectivelyBack to article page