A Diagnostic Accuracy Study Testing Fecal Biomarkers In Comparison To Endoscopic Examination

In this study it will be explored whether the levels of fecal biomarkers are associated with histologic inflammation of the intestinal mucosa and concomitant alteration of the mucosal permeability. The aim of the study is to assess the diagnostic accuracy of fecal biomarkers especially to detect the potential of differentiation between inflammatory and functional gastrointestinal diseases. The following biomarkers will be examined in the stool of the participants: calprotectin, lactoferrin, pmn-elastase, human beta-defensin, zonulin, alpha-antitrypsin.