Most common cause of acute gastroenteritis (AGE)<unk>  usually lasts <7d
Do NOT diagnosis isolated vomiting as AGE!
Viral gastroenteritis
Abdominal aortic aneurysm
Bacterial gastroenteritis
Aortocaval fistula
Acute gastroenteritis 
Acute gastroenteritis
Aortoenteric fisulta
Post-infectious irritable bowel syndrome