Fig. 2

Multilocus sequence analysis (MLSA)-based mid-rooted phylogenetic tree of the concatenated nucleotide sequences of seven MLST loci of 53 C. trachomatis strains isolated from Sapporo. Reference sequences were obtained from the Chlamydiales MLST database https://pubmlst.org/bigsdb?db=pubmlst_chlamydiales_seqdef&page=profiles. Each clinical strain is represented by its identification number (ompA genotype/collection year). Two red lines divide the tree into two distinct groups: cluster 1 and cluster 2. Sequence types (STs) are shown in colored boxes to represent the corresponding clinical strains. The scale bar represents the number of nucleotide substitutions per site