Get your copy of Ruth's ebook The Powerful Secrets of Seduction. Enteric Arthritis - a form of chronic inflammatory arthritis associated with inflammatory bowel disease (IBD), the two most famous of which are ulcerative colitis and Crohn's disease. About one in five patients with Crohn's or ulcerative colitis develop enteric arthritis. The most common site affected by inflammation is the peripheral (limbs) joints and spine.