1. Viral gastroenteritis : Causes, incidence, and risk factors  (Trust Mark: Doctor-Reviewed)
Viral gastroenteritis is a leading cause of severe diarrhea in both adults and children. Many types of viruses can cause gastroenteritis. The most common ones are: Astrovirus; Enteric adenovirus; Norovirus (also called Norwalk-like virus. It is co...• Reviewer: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; George F. Longstreth, MD, Department of Gastroenterology, Kaiser Permanente Medical Care Program, San Diego, CA. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

2. Bacterial gastroenteritis  (Trust Mark: Doctor-Reviewed)
Bacterial gastroenteritis is an inflammation of the stomach and intestines caused by bacteria. See also: Food poisoning; Shigella gastroenteritis; Viral gastroenteritis.• Reviewer: Linda Vorvick, MD, Family Physician, Seattle Site Coordinator, Lecturer, Pathophysiology, MEDEX Northwest Division of Physician Assistant Studies, University of Washington School of Medicine; and George F Longstreth, MD, Department of Gastroenterology, Kaiser Permanente Medical Care Program San Diego, California. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.