Phylogenic tree showing the relationships between isolated strains and closely related species based on 16S rRNA gene sequences.

<p>The sequence of <i>Escherichia coli</i> ATCC 25922 served as an outgroup sequence. The tree was constructed using the neighbor-joining method. The numbers at nodes indicate the percentages of occurrence of the branching order in 1000 bootstrapped trees. Scale bar = 0.5% divergence.