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Maximum parsimony tree of S. Typhimurium genomes based on SNPs identified by mapping to the reference genome of S. Typhimurium LT2. The numbers on branches correspond to numbers of SNP differences. GenBank accession numbers for the publicly available genomes are given in parentheses. The unit of the scale bar is number of SNPs. S. Enteritidis and S. Choleraesuis were used as the outgroup.
