Figure 1. Maximum-parsimony tree of 288 human isolates and 78 linked food and veterinary isolates of Salmonella enterica serovar Typhimurium and its monophasic variants based on core-genome SNP analysis with the complete genome of Salmonella Typhimurium 14028S as the reference genome in an outbreak investigation of Salmonella Typhimurium and its monophasic variants, Denmark. Branches are labeled with number of SNP differences. Three ST groups are highlighted: ST19, ST34, and ST36. SNP, single-nucleotide polymorphism; ST, sequence type.