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Phylogenetic relationships between strains of Pasteurella, including the type strain of P. multocida subsp. septica only (left panel) and 11 additional strains of this taxon (right panel), based on maximum-likelihood analysis of 16S rRNA gene sequences. The support for monophyletic groups by bootstrap analysis is indicated as percentages. Nodes recognized by maximum-parsimony analysis are marked with an asterisk. Strains sequenced in the present study are in boldface type.
