The primer P2 could be used to differentiate Shigella and enteropathogenic E.coli from S.pullorum,but not be used to differentiate Shigella from enteropathogenic E.coli.

• 引物P2的扩增图谱不能将志贺菌和大肠杆菌鉴别开，但可将这2种菌与沙门菌鉴别出来；