What is atypical diarrhea?

For instance: If you had a rainbow glitter filled poop- that would be atypical (unless you were a unicorn). However, the term probably applies to diarrhea that is caused by unusual infectious organisms that don't typically cause diarrhea or diarrhea that lasts longer than usual. It is a very nonspecific term. http://www.medscape.com/viewarticle/505473_3

More data needed: "Atypical" does not mean anything with "diarrhea". Sloppy wording. Is it infection or inflammatory? Stool cultures and C Difficile tests rule out the former. Colonoscopy helps with the latter. In addition there are malabsorption syndromes or certain cancers that can cause diarrhea - gastroenterologist can help get to the bottom of this.