Collagenous colitis Treatment-caused Diversion colitis Chemical colitis Chemotherapy-induced colitis Radiation colitis Checkpoint inhibitor induced colitis Vascular disease Ischemic colitis Infectious Infectious colitis A subtype of infectious colitis is Clostridioides difficile colitis, which is informally abbreviated as "C-diff colitis". It classically forms pseudomembranes and is often referred to as pseudomembranous colitis, which is its (nonspecific) histomorphologic description. 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. Parasitic infections, like those caused by Entamoeba histolytica, can also cause colitis. Unclassifiable colitides 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. 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. Treatment Some people may be admitted into the hospital following the colonoscopy depending on results. It is sometimes necessary to get the patient started on a steroid to speed up the healing of the colon. It may also be necessary to get the patient hydrated from the fluid loss and iron replaced from the loss of blood. After a hospital stay, the patient may be put on a daily medication to manage their chronic colitis. The medication can be an anti-inflammatory or an immunosuppressant. There are many different types of medication used and the doctor will prescribe the one they see fit. If the patient doesn't respond, new medications will be tried until there is a good fit. Moreover, several studies recently have found significant relationship between colitis and dairy allergy (including: cow milk, cow milk UHT and casein), suggesting some patients may benefit from an elimination diet. Microbiome modification The use of oral probiotic supplements to modify the composition and behaviour of the microbiome has been considered as a possible therapy for both induction and maintenance of remission in people with Crohn's disease and ulcerative colitis. A Cochrane review in 2020 did not find clear evidence of improved remission likelihood, nor lower adverse events, in people with Crohn's disease, following probiotic treatment. For ulcerative colitis, there is low-certainty evidence that probiotic supplements may increase the probability of clinical remission. People