is a general term referring to ,
Virus es, or other parasites, or less commonly reactions to new foods or
Medications . It often involves stomach pain (sometimes to the point of being crippling),
Diarrhea and/or
Vomiting , with noninflammatory infection of the upper
Small Bowel , or inflammatory infections of the
Colon .
Sleisenger & Fordtran's Gastrointestinal and Liver Disease 7th edition, by Mark Feldman; Lawrence S. Friedman; and Marvin H. Sleisenger, ISBN 0-7216-8973-6, Hardback, Saunders, Published July 2002
Mandell's Principles and Practices of Infection Diseases 6th Edition (2004) by Gerald L. Mandell MD, MACP, John E. Bennett MD, Raphael Dolin MD, ISBN 0-443-06643-4 · Hardback · 4016 Pages Churchill Livingstone
Harrison's Principles of Internal Medicine 16th Edition, The , ISBN 0-19-262922-0
