A pilot study investigating if orally administrated faecal microbiota transplantation capsules have the potential to treat active microscopic colitis.

Inclusion Criteria:

• Diagnosis of microscopic colitis
• Date of diagnosis/histological confirmation < 12 months
• Active disease according to Hjortswang's criteria

Exclusion Criteria:

• Diagnosed with ulcerative colitis or Crohn's disease
• Diagnosed with celiac disease
• Active gastrointestinal infection
• Previous bowel resection of bowel (except appendectomy)
• Previous cholecystectomy
• Treatment with systemic steroid within 4 weeks, including budesonide
• Antibiotics 3 months prior
• Severe immunodeficiency,
• Pregnancy, planned pregnancy and breastfeeding
• Treatment with constipants such as psyllium, loperamide, bile binders, opium drops or codeine up to 2 weeks before inclusion and during participation