Figure 5.

Radial phylogram showing the phylogenetic relations of Salmonella enterica var Typhimurium (S Typhimurium) sequence types (STs)

The S Typhimurium sequence types (red or yellow circles) are rooted to Salmonella enterica var Typhi (S Typhi) (blue circle) and Salmonella enterica var Paratyphi A (S Paratyphi A) (green circle). Genetic distance is calculated as the number of single nucleotide polymorphisms per base and is indicated as a solid black line. The length of this line is proportional to the degree of genetic divergence. S Typhimurium sequence types from various worldwide locations outside sub-Saharan Africa (red) and from sub-Saharan AfrIca (yellow) are shown.