Fig 1. Minimum spanning tree established on the 117 identified MLST sequence types (STs) of 602 C. jejuni isolates obtained from chicken feces, carcasses, meat, and humans.

Each circle and number by the circle represents one ST. The size of the circle is positively correlated to the isolate numbers with the same ST and different colours indicate isolate source (green—chicken feces, blue—chicken carcasses, red—chicken meat, yellow—humans). The thickness of the circle connecting lines is proportional to the similarities between STs.