Fig. 1From: Comparative genomic analysis of toxin-negative strains of Clostridium difficile from humans and animals with symptoms of gastrointestinal diseaseA midpoint rooted phylogenetic tree depicting the five C. difficile clades. Australian toxin-negative strains are identified with blue strain names. Complete, closed genomes available in GenBank that were used as a reference are in green text. Genome names in black text are from a previous study [20]. The tree was constructed from reference-based whole genome alignments. Strains within boxed regions indicate genomes used in the ALL vs ALL BLASTp analysis. Clades highlighted in blue indicate clade 4 and in aqua is clade 1Back to article page