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Phylogenetic tree of C. coli strains based on a whole genome single nucleotide polymorphism analysis using the CSI Phylogeny 1.4 program. Four representative C. coli ST-1562 strains from swine are comparatively analyzed with 24 C. coli complete genomes deposited on the NCBI database (accession numbers are shown). Sources of different strains are shown in different colors (humans, blue; poultry, red; swine, green; cattle, purple; unknown, grey).
