Estimated time of most recent common ancestor (MRCA) of Mycobacterium bovis and Bayesian maximum clade credibility phylogeny from affected cattle farms and wild white-tailed deer in Minnesota, 2005–2009, and M. bovis isolates associated with a Texas beef herd sampled 2013–2014.

(A) Phylogenetic relationship between the Minnesota and Texas isolates with an estimated MRCA of 1999 (95% HPD [1991, 2005]). Node labels are the posterior probability. 95% HPD bars are displayed on nodes with >0.4 posterior probability (B) Isolates from only the Minnesota phylogeny in an unresolved maximum clade credibility tree. Nodes with ≤ 0.40 posterior support are collapsed onto unresolved branches. Node labels are the posterior probability and 95% HPD bars are displayed on nodes with >0.4 posterior probability (C) Density of marginal posterior probability MRCA estimates for M. bovis isolated from cattle and white-tailed deer from the Minnesota outbreak. The isolate names contain information on species (Deer = white-tailed deer and Herd = cattle), cattle herd (A-L; S1 Text), and individual deer identification (1–27); corresponding to the S2 Table. White-tailed deer isolate marked †, was from a pooled sample from multiple individuals.