Figure 2.

Neighbour-joining tree of Salmonella Chester isolates, based on 3,009 core genes included in core genome multilocus sequence typing Norway, 2000–2016 (n = 51)

Nodes are labelled according to year of isolation. In addition, country of acquisition and seven-gene sequence type (ST) is noted. Scale bar shows absolute number of allelic differences. Green and white: European cluster (ST411 and ST5260); red: African cluster (ST1954); blue: Asian cluster 1 (ST343); lilac: Asian cluster 2 (ST2063). The analysis was performed in in Ridom SeqSphere⁺.