shigella and escherichia belong to the enterobacteriaceae family which are the cause for most of the diarrheal cases in the world. shigella can cause bacterial dysenteries and shigellosis. one of the most effective proteins for pathogenesis is invasion plasmid antigen c (ipac). other bacteria like enterotoxogenic (etec), enterohemorrhagic (ehec), and e.coli can also cause diarrhea and produce i...