It means that it may not be a true ulcerative colitis but may be colitis related to some infection or antibiotic induced colitis

There are several sites that have information about colitis and diets for colitis. Here are two websites that might be able to help you: http://colitis.emedtv.com/ulcerative-colitis/ulcerative-colitis-diet.html AND http://www.webmd.com/ibd-crohns-disease/ulcerative-colitis/creating-an-ulcerative-colitis-plan

Colitis is a general term referring to inflammation of the colon, which can be caused by various factors such as infection or autoimmune conditions. Ulcerative colitis is a specific type of colitis that is a chronic inflammatory bowel disease characterized by ulcers in the colon and rectum. Ulcerative colitis is a subset of colitis.

she has colitis of the mouth :(

No such thing as systemic colitis