Fig 2. Minimum Spanning Tree showing relationships of the B. hyodysenteriae isolates from this study (marked with an asterisk) and 349 previously described isolates that were obtained from PubMLST.

The isolates shown originated from Australia, Austria, Belgium, Brazil, Canada, Germany, Italy, Japan, Korea, Serbia, Sweden, the UK and the USA. In the MST, each node represents a different ST (labelled) and the colour represents the country of origin. The size of the node indicates the number of strains having the same ST. The STs containing the isolates from the current study are indicated by an asterisk, which are coloured white for the new STs and yellow for previously described STs. The STs of the weakly haemolytic isolates from herd C in the current study (ST134) and of weakly haemolytic strain D28 from a previous study (ST172) [32] are shown with arrows.