Fig. 1From: Community-acquired infection with hypervirulent Clostridium difficile isolates that carry different toxin and antibiotic resistance loci: a case reportPhylogenetic analysis and population genetic structure of Sequences Type (ST) 1 and related STs. a Maximum-likelihood tree based on the concatenated alignment of the seven housekeeping genes used in the MLST scheme. For phylogenetic reconstructions, sequences of the total STs reported for the clade (associated with hypervirulent strains) and representative STs of the other CD clades (selected under the criteria described in Additional file 1) were used. The red points represent Bootstraps > 80%. The ST-1 (isolates from this study) has been marked with a red asterisk. b Population genetic structure of clonal complex 1, based on the eBURST algorithm. Each box represents the Sequence Type, with the founder STs marked in yellow. A red circle was used to mark the node where the ST-1 is a founderBack to article page