| Interventions |
Group 1: Non-interventional study with children and adolescents treated for six to eight weeks with exclusive enteral nutrition for induction of remission of active crohn's disease. Before initiation of therapy diagnosis is established. Venipuncture and endoscopy are part of the routine diagnostic workup. Two to six weeks after initiation of therapy the patient will be re-evaluated. Additionally, patients will be asked to provide stool samples. Group 2: Treatment of children or adolescents with active crohn's disease with biologicals or steroids. Before initiation of therapy diagnosis is established. Venipuncture and endoscopy are part of the routine diagnostic workup. Two to six weeks after initiation of therapy the patient will be re-evaluated. Additionally, patients will be asked to provide stool samples. |