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Clustering of the strains based on the partial flaB gene sequences. The UPGMA tree was applied in BioNumerics. The flaB type (I), species (II), and ST (III) are indicated. The numbers in parentheses indicate variants of identical flaB types within flanking regions of the sequence used for allele definition by PubMLST. New flaB types described in this study are indicated by boldface.
