Figure 2.

ML trees based on concatenated sequences of the seven housekeeping gene fragments. Position of the artificial root (black circle) corresponded to branching of the out-group (B. suis 1330^T) included in the analysis but not shown on the tree. Horizontal lines are scales for genetic distance. Numbers given at the nodes are support values estimated with 100 bootstrap replicates. Only bootstrap values >50% are indicated. For better visualization of the tree, bootstrap values are shown at the terminal nodes. The scale bar indicates the number of substitutions per nucleotide position. The clonal complexes MSCC and eBCC determined by Minimum Spanning and eBurst, respectively are indicated by vertical bold bars. Blue: clinical strains; green: environmental strains. (*) indicated major conflicting phylogenetic positions between the seven genes-based tree and the trpE-based tree in Fig 3.