All about food poisoning Gastroenteritis is a condition that involves inflammation of the lining of the intestines, in particular the stomach and intestines. It usually resolves without medication, but in some cases it can lead to complications. Food poisoning is a major cause of gastroenteritis, leading to a familiar set of unpleasant symptoms. Gastroenteritis is typically caused by viruses, bacteria, or parasites; this is called food poisoning when the source of such infection is infected food. Gastroenteritis can also be called "gastric flu" or "stomach flu." Fast facts on gastroenteritis and food poisoning Here are a few key points about gastroenteritis and food poisoning. In the body of this article there is more detail and supporting information. Most cases of gastroenteritis are caused by infection with bacteria, viruses, or parasites Diarrhea, nausea, vomiting, and abdominal pain are typical symptoms of gastroenteritis Gastroenteritis is typical