Symptoms of Acute Gastroenteritis

The symptoms and severity of acute gastroenteritis are largely influenced by the type of microorganisms or toxins ingested, as well as individual differences in immune resistance—leading to variations in clinical presentation among patients. Infectious acute gastroenteritis typically manifests with diarrhea, abdominal pain, nausea, and vomiting; fever and headache are also common accompanying symptoms. In severe cases, substantial fluid loss may result in dehydration and electrolyte imbalances.