Figure 2. Phylogenetic analyses of concatenated sequences of seven housekeeping gene fragments of Streptococcus suis strains isolated from human patients and pigs in the Netherlands.

The tree was constructed using Neighbor-Joining algorithm in SplitsTree4 using MLST allelic profiles. Distance matrix was obtained from allelic profiles using the SplitsTree program at http://pubmlst.org/analysis/. ST’s comprising the different clonal complexes are circled. Serotypes are indicated by coloured dots with a diameter corresponding to the number of strains. The horizontal line indicates the scale for genetic distance in arbitrary units.