Patients who are asymptomatic
Patients with severe, refractory disease (defined as Mayo scores of > 10, or endoscopic disease activity score of > 3) or patients with any other significant condition which, in the opinion of the investigator, could confound or interfere with evaluation of safety, tolerability of the investigational treatment or prevent compliance with the study protocol
Prior colectomy
Positive stool test for any of the following: Clostridium difficile by PCR, Salmonella, Shigella, Yersinia, Campylobacter, enteropathogenic Escherichia coli by standard stool culture
Use of the steroid medications (any formulation) in the prior 6 weeks to enrolment
Systemic antibiotic use within prior 6 weeks to enrolment
Regular probiotic supplement use within prior 48 hours to enrolment
Pregnancy or breastfeeding
Severe immunodeficiency, inherited or acquired (e.g. HIV, chemotherapy, or radiation therapy)
History of anaphylaxis (severe allergic reaction)
Documented allergy to fluoroquinolones, metronidazole
Life expectancy less than 12 months
Age less than 18 or greater than 75 years of age
History of esophageal or gastric motility disorders