a child holds a container with a stool test in his hands. concept of a study of stool analysis in children for

child feces analysis stool occult blood test container dysbacteriosis coprogram calprotectin laboratory study medicine medical parasites worms helicobacter pathogenic microflora gastroenterology microbiological diseases gastrointestinal tract cologram helminth eggs biochemical background digestion preparation protozoan disease intestinal infections oocytesitis childrens baby bacteria