<P> Enterohemorrhagic colitis may be caused by Shiga toxin in Shigella dysenteriae or Shigatoxigenic group of Escherichia coli (STEC), which includes serotype O157: H7 and other enterohemorrhagic E. coli . </P> <P> Parasitic infections, like those caused by Entamoeba histolytica, can also cause colitis . </P> <P> Indeterminate colitis is the classification for colitis that has features of both Crohn's disease and ulcerative colitis . Indeterminate colitis' behaviour is usually closer to ulcerative colitis than Crohn's disease . </P> <P> Atypical colitis is a phrase that is occasionally used by physicians for a colitis that does not conform to criteria for accepted types of colitis . It is not an accepted diagnosis per se and, as such, a colitis that cannot be definitively classified . </P>

How many different types of colitis are there