Infection is mainly the spread, parasitism and onset of virus or bacteria, commonly known as enteritis.
Rotavirus (diarrhea in autumn and winter) and Norwalk virus are the two most common pathogens of viral enteritis, which lead to more serious egg soup-like or watery diarrhea.
There are two main types of bacterial enteritis: enterotoxin type and invasive type. Both are acute enteritis. Enterotoxin-producing bacteria multiply and produce toxins after entering the intestine, which mainly leads to watery diarrhea with serious invasion, such as Escherichia coli 0 157, dysentery caused by Shigella (only Shigella is called dysentery, not all acute diarrhea is "dysentery"), purulent bloody stool, and "poisoning symptoms" such as nausea, vomiting, abdominal pain and high fever.
The most common non-infectious type is food-borne diarrhea. Because food accumulates in the upper digestive tract, the acidity in the stomach drops, and the bacteria in the intestine move up, producing short-chain organic acids and toxins, causing diarrhea.
Breastfed babies are prone to a kind of "physiological diarrhea", mainly because the baby's intestinal mucosa lacks lactase. Lactose in breast milk cannot be decomposed, and then it is decomposed into colon by bacteria, producing a lot of gas (methane, etc.). ) and acetic acid, leading to diarrhea.
(2) According to the stool test, whether white blood cells are seen can be divided into two categories:
One is that there are no white blood cells or only a few white blood cells, including viral diarrhea (watery stool, but it can be cured within a week), food-borne diarrhea (food accumulation), physiological diarrhea, malabsorption diarrhea and allergic diarrhea.
The other type has more white blood cells and belongs to "invasive infection", which is common in infections such as Shigella dysenteriae and Yersinia.
The significance of this syndrome differentiation and classification: first, the characteristic etiology judgment provides ideas and directions for treatment. These two syndromes almost distinguish the severity of diarrhea.