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gastroenteritis (gas″tro-en″tәr-i´tis) inflammation of the lining of the stomach and intestine. Psychologic causes may include fear, anger, and other forms of emotional upset. Allergic reactions to certain foods, or irritation by excessive use of alcohol, can also cause it. Severe gastroenteritis, with such symptoms as headache, nausea, vomiting, weakness, diarrhea, and gas pains, may result from various infectious and contagious diseases, such as typhoid fever, influenza, and food poisoning. bacterial gastroenteritis
any type caused by a bacterial toxin or bacterial infection, the most common agents being Salmonella, Shigella, and Campylobacter. See also food poisoning. eosinophilic gastroenteritis
a disorder, commonly associated with intolerance to specific foods, marked by infiltration of the mucosa of the small intestine
and frequently the stomach by eosinophils, with edema but without vasculitis and by eosinophilia of the peripheral blood.
Symptoms depend on the site and extent of the disorder. viral gastroenteritis
any type caused by a virus, the most common agents being rotaviruses and Norwalk virus.
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