This study is for people who have had a proctocolectomy with an ileal pouch anastomosis (IPAA) to treat ulcerative colitis (UC). More than 50% of people who have had an IPAA will develop a condition called pouchitis. Pouchitis is short or long-term inflammation of the ileal pouch that was created in order to store waste from your intestines. Patients with pouchitis are being asked to take part in this study.