Colitis is an inflammatory condition that has both infectious (contagious) and non-infectious types. The main types of colitis and their transmissibility are as follows:

* Infectious Colitis: Mostly contagious, but non-infectious subtypes also exist.
* Pseudomembranous Colitis: Contagious.
* Enteritis: Has both infectious and non-infectious forms.
* Proctitis: Has both infectious and non-infectious forms.
* Crohn's Disease: Not contagious.
* Ulcerative Colitis: Not contagious.
* Allergic Colitis: Not contagious.
* Ischemic Colitis: Not contagious.
* Microscopic Colitis: Not contagious.

Contagious types of colitis can spread from person to person through direct contact. In some types, the infection can also be transmitted via contaminated food, liquids, or objects (e.g., clothing).