Functional gastrointestinal disorders from childhood to adulthood

They include a range of pathologies diagnosed only based on symptomatic criteria detailed in the Rome classification¹. Its recent update (Rome IV) puts forward etiological and pathophysiological studies as well as the identification of biological markers guiding the development of new therapies and personalized patient care. In that respect, intestinal bacterial populations represent an active research field, whose results–sometimes controversial– are discussed hereafter.