foodborne illness

foodborne illness stomach ache microorganisms toxins virus salmonella ecoli listeria norovirus contaminated stomachache abdomen gut cramp cramps acid reflux enteritis bowel nausea sick vomiting dyspepsia queasiness inflammation diarrhea constipation intestinal disorders bloating flatulence concept colon ileum ileocolic gastroenteritis irritable colonoscopy symptoms diagnosis abdominal pain painful medicine obstruction elements pains digestive system infection