of a proctologist or colonoscopy with a doctor examining the colon and showing harmful bacteria

proctologist colonoscopy colon health medical medicine cancer bacteria spasm care pain digestion intestinal anatomy bacterium illness bacillus gastrointestinal intestine harmful abdomen microflora human tract lactobacillus probiotic oncology diarrhea vector science lab examine check anamnesis consultation diagnostic bowel ui ux organ doctor system web social media disease microbiota design