Figure 7From: Comparative genomics of the classical Bordetella subspecies: the evolution and exchange of virulence-associated diversity amongst closely related pathogensThe phylogenetic tree of the ptx/ptl locus. The tree was reconstructed by maximum likelihood methods with 1,000 bootstrap replicates based on the ptx/ptl locus sequences. B1920 represents B1834 and Tohama I represents CS because they have the identical sequences.Back to article page