Fig. 2.

Phylogeny. Whole genome phylogeny of F. tularensis subsp. holarctica based on SNPs in an alignment of nine published genomes (strain names are indicated) showing the placement of the Bulgarian strains in a global phylogenetic framework. Bulgarian outbreak strains and the non-outbreak strain 94 sequenced in this study are indicated in bold text. B.4, B.6, B.12, and B.16 indicate the four major canSNP clades of the subspecies. B.20 and B.23 indicate two B.12 subclades that included Bulgarian strains The tree was mid-point rooted in FSC022. The total length of the root branch was 3,317 base differences.