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Phylogenetic relatedness of analyzed poultry strains to a representative group of other strains belonging to ST5 group determined by the analysis of 97 different loci, 44 kb of sequence in total. The poultry-associated strains comprise a distinctive phylogenetic group. Markedly, CH21 and ch22 strains are indistinguishable. Fragments of the tree containing reference strains ED98 and N315 for poultry- and human-origin strains, respectively, are magnified.
