Fig. 4

Median Joining haplotype network based on 141 polymorphic sites on the mitochondrial genome of S. endobioticum, of which 122 were parsimony-informative. Nodes in the network are coloured based on pathotype identity. Colours are used for pathotypes of major importance in Europe and Canada, whereas a greyscale is used for pathotypes of lesser importance [9]. Black nodes represent hypothetical ancestors. Marks on the branches indicate the number of mutations, and the numbers are shown on branches with > 5 mutations. No signatures for multiple mitochondrial haplotypes were detected for isolates with an asterisk “*”