[Element of digestive pathophysiology and fecal analysis]

Fecal analysis includes qualitative and quantitative studies which allows quantification and labelling of numerous pathophysiologic phenomenona. Malabsorption and over-absorption of water and electrolytes give rise to six types of watery diarrheas, and two types of constipations; malabsorption of nutriments and maldigestion of food, give rise to two types of fatty and nitrogenous diarrheas with metabolic consequences. Fecal analysis often discriminates organic from non-organic diseases and brings informations on increase or decrease of caloric losses, to the nutritionist. Microscopic observations which requires a high degree of competence and experience, allows the recognition of malabsorption/maldigestion phenomenona, of fortuitous presence of parasites and a good interpretation of a fecal file.