A primary bacterial infectious disease that results_in infection located_in epithelium of colon, has_material_basis_in Shigella boydii, has_material_basis_in Shigella dysenteriae, has_material_basis_in Shigella flexneri, or has_material_basis_in Shigella sonnei, which produce toxins that can attack the lining of the large intestine, causing swelling, ulcers on the intestinal wall, and bloody diarrhea. The bacteria are transmitted_by ingestion of food and water contaminated with feces.