 Gastroenteritis , also known as infectious diarrhea , is inflammation of the gastrointestinal tract that involves the stomach and small intestine . Signs and symptoms include some combination of diarrhea , vomiting , and abdominal pain . Fever , lack of energy , and dehydration may also occur . This typically lasts less than two weeks . It is unrelated to influenza though it may be associated with the flu. kwietniki-na-pomorzu.pl</s>