Viral gastroenteritis
Bacterial gastroenteritis
Campylobacter infections
Clostridium difficile<unk> 
Colon cancer
Crohn disease
Cryptosporidiosis
Mycobacterium Avium-Intracellulare
Toxic megacolon
Ulcerative<unk> 
Ischemic bowel disease (e.g. mesenteric ischemia, strangulated hernia)
Pseudomembranous enterocolitis
Lymphoma
Ileocecal amebiasis
Sarcoidosis
Yersinia
Campylobacter
Colitis
Viral gastroenteritis
Appendicitis 
Bacterial gastroenteritis
Appendicitis
Campylobacter infections
Phlebitis
Clostridium difficile colitis