Fig. 1

Phylogenetic tree of C. difficile strains, based on whole-genome sequencing. The sequence type (ST) is indicated after the strain label. MLST clades are marked with colored squares: Clade 1 (red), Clade 3 (blue), Clade 4 (purple) and Clade 5 (green). NC_009089 was used as a reference genome for alignment. Tree scale: 0.001. The Phylogenetic tree was created in iTol (https://itol.embl.de/), version 6.9.1.