Phylogenetic relationships of emm59 ABCs isolates recovered in 2015. All but 5 of these 53 isolates were recovered in New Mexico. The values shown are SNP differences. Three additional isolates (recovered in 2011 and 2012, two in New Mexico and one in Colorado) were obtained from the GenBank database from reference 25. Clade 1 is defined by ST864, while clade 2 is defined by ST172. All isolates above or below the arrows share the features indicated, with three exceptions (20154161, 20152762, and 20152741).