Figure 2

Gain and loss of putative genomic regions among eight Cronobacter genomes. Genomic regions (see Table 3 and Additional file 4: Table S2 for more details) are shown as present (+, shaded boxes) or absent (−, dashed borders), representing most likely point of gain or loss for each genome or group of genomes. The ancestral core comprises the current eight Cronobacter core genome (Additional file 3: Table S1) and GIs 1–34, 55–57, 67, 83. Underlined genomic regions are those whose current species distribution occurred through both insertions and deletions in the evolutionary history of Cronobacter.