A phylogenetic tree of all sequenced A. baumannii genomes constructed using whole genome alignments. Open boxes represent those strains from the colonization phenotype (wound, skin) and the star represents those isolates from the invasive phenotype (blood, urine); the black dots indicate the MDR strains. For genomes with no phenotype description, the phenotype is either unknown or does not affect humans. The tree is constructed based on the >300,000 variable locations in the genome alignment. The support values at all nodes are > 90%. There is little clustering based on the isolation source or MDR status based of the isolates suggesting that these traits may be being acquired via horizontal gene transfer and are not highly conserved.