Fig. 2

Minimum spanning tree of the isolates of 38 S. dysenteriae isolates from diarrhea calves based on multilocus sequence typing (MLST). The minimum spanning tree was constructed using the 4 identified STs obtained from the 38 isolates using BioNumerics Software. Each circle corresponds to a single ST. The shadow zones of circles’ filling in green correspond to beef, and red to dairy cows. The size of the circle is proportional to the number of isolates and the numbers over the branches means the difference between the two ST types. The corresponding color, number of isolates and background information are shown to the right of the minimum spanning tree. The number on the lines represent the number of different genes between the two conjoint STs