Genomic diversity among Acinetobacter strains. (A) Partial Venn diagram. Each A. baumannii strain is depicted by an oval colored according to IC designation. Numbers presented in overlapping regions of the ovals show the number of genes shared by that group of strains. For example, the core genome size shown in the center, where all ovals overlap, is 1560 ORFs. Numbers in the non-overlapping regions show the number of genes unique to that strain. (B) Phylogenetic tree based on a concatenated alignment of the core housekeeping genes cpn60, fusA, gltA, pyrG, recA, rplB and rpoB in the strains under investigation. A. baylyi ADP1 (GenBank; CR543861) was used as an outgroup and the dotted line used in the ADP1 branch indicates a branch length greater than that shown. Numbers to the right of the tree show the size of the total number of conserved ORFs (the core genome) in the set of strains indicated.