Phylogenetic tree highlighting the position of S. arizonae RKS2983 (shown in bold) relative to strains of other Salmonella lineages. The corresponding GenBank accession numbers are displayed in parentheses. The tree was built based on the comparison of concatenated nucleotide sequences of 945 conserved genes in all strains. Individual orthologous sequences were aligned by the MAFFT program  and concatenated. The phylogenetic tree was constructed by using the MEGA 4.0 software  with Neighbor-Joining method. The bootstrap values are shown at branch points.