Viral
Rotavirus
Norovirus, Norwalk virus
Enterovirus
Adenovirus
Bacterial
Salmonella
Shigella
Yersinia
Campylobacter
Escherichia coli
Vibrio species
Clostridium difficile
TB
Parasitic
Giardia
Entamoeba
Cryptosporidium
Rotavirus
Norovirus, Norwalk virus
Enterovirus
Adenovirus
Salmonella
Shigella
Yersinia
Campylobacter
Escherichia coli
Vibrio species
Clostridium difficile
TB
Giardia
Entamoeba
Cryptosporidium
Overfeeding
Food allergy
Starvation stools
Intussusception
Hirschsprung's disease
Partial SBO
Appendicitis
Blind loop syndrome
Intestinal lymphangiectasia
Short bowel syndrome
Cystic fibrosis
Celiac disease
Disaccharidase deficiency
Secretory neoplasms
Immunodeficiency
Endocrinopathy
Hyperthyroidism
Hypoparathyroidism
Congenital adrenal hyperplasia
Hyperthyroidism
Hypoparathyroidism
Congenital adrenal hyperplasia
Inflammatory bowel disease
Antibiotic-associated<unk> Secondary lactase deficiency
Irritable colon syndrome
Neonatal abstinence syndrome
Toxins
Hemolytic uremic syndrome
Diarrhea 
Viral
Constipation 
Rotavirus
Constipation
Norovirus, Norwalk virus
Sedation 
Enterovirus