Figure 1

Phylogenetic tree based on 16S rRNA sequences of Actinobacillus sensu stricto species plus A. capsulatus and H. parasuis as outgroups. A. equuli subsp. equuli is indicated in bold. The RDP aligner, which applies the Jukes-Cantor corrected distance model to align sequences, and the RDP Tree Builder, which implements the Weighbor algorithm [36] for tree construction were used. Tree building also involved a bootstrapping process in which the values to the left of the branches illustrate the frequency of occurrence of a branch in 100 replicates [37].