It is an inflammation of the internal or mucosal layer of the intestine caused by an infection.
It is commonly caused by a virus (norovirus, rotavirus, adenovirus and astrovirus) but it can also be bacterial or parasitic. It is contracted after consuming contaminated water or foods.
It manifests as nausea, vomiting, diarrhoea, abdominal pain, headache, general discomfort, fever and chills.
Diagnosis is obtained through questioning and a physical examination; it may be necessary to perform blood and stool tests to study the severity and the causal agent of the clinical picture.
Generally it is a disease which passes without any need for treatment. If necessary, symptomatic treatment should be performed and correct hydration ensured. Antiemetics may be added in the case of vomiting.
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