Fig. 3

Citrobacter core genome tree. A maximum likelihood phylogenetic tree constructed from the concatenated core amino acid sequences of 197 Citrobacter strains was used to determine the taxonomic designation of the unspeciated Citrobacter strains in this study (yellow dots). Genome distance estimation was performed using MASH and the core genome was analyzed using centreseq [27]. genes. Genetic distance is defined by the scale and bootstrap values indicate percentages of 1000 replicates. Triangles denote collapsed nodes with n representing the number of strains found in each triangle. For each triangle, the letters represent the group of related strains found in the branches of the node