Phylogenetic tree constructed using nearly full-length (∼1400 bp) sequences of the 16S rRNA gene of <i>S. wadsworthensis</i> strains from UC and controls alongside other <i>Sutterella</i> sequences available in GenBank.

<p>The evolutionary history was inferred using the Neighbor-Joining method. The percentage of replicate trees in which the associated taxa clustered together in the bootstrap test (1000 replicates) are shown next to the branches. The tree is drawn to scale, with branch lengths in the same units as those of the evolutionary distances used to infer the phylogenetic tree. The <i>S. wadsworthenis</i> isolates from IBD cases are marked in red and those from controls are marked in blue.