(1) With a history of engorgement or intake of dirt and decayed food.
(2) With urgent onset, nausea, frequent vomiting, severe diarrhea, watery stool with undigested food, a little mucus and even blood, etc.
(3) People usually with the fever, headache, discomfort of the whole body and other varies of degrees of the poisoning symptoms.
(4) People with severe vomiting and diarrhea may also have the symptoms of dehydration, oxidosis and even shock;
(5) With unobvious signs, with pain in the upper abdomen and the around the nave, without muscular tension and rebound tenderness, borborygmus and hyperfunction.
