In collaboration with The Egyptian Micro-Biota Society, the department of Tropical Medicine and Gastroenterology, Faculty of Medicine, Assiut University organized a scientific symposium entitled "Gastrointestinal Tract Micro-biota in Health and Illness: A promising Scientific Revolution." The goal of the symposium was to shed light on the Micro-biota; "microbes and bacteria" that live in the digestive tract and their relationship to health and illness.