Investigation of the Influence of the Human Microbiome on Giant Cell Arteritis

Who May Qualify: • Diagnosis of Giant cell arteritis (only in one arm) Who Should NOT Join This Trial: - chronic infection (viral, fungi, bacteria) including human weakened immune system viruses, Hepatitis B/C - acute infection with usage of antibiotics less then 90 days before screening - major gastro-intestinal surgery \<5 years from screening - gastro-intestinal bleeding \<90 days before screening - inflammatory bowel disease (confirmed bioptically) - bulimia or anorexia nervosa - adipositas (body mass index ≥ 40) - intake of high dosage of probiotics (\>10\^9 colony forming units per day) \<90 days before screening - not controlled Diabetes mellitus - Malignancy within one year (except for squamous skin - and basal skin carcinoma without metastasis, cervix carcinoma with curative surgery, Cutaneous T-cell lymphoma) - known abuse of alcohol oder drugs. Always talk to your doctor about whether this trial is right for you.