Pig diseases in the digestive tract are a major “killer†of the winter herds and, once the disease occurs, it is difficult to control.
The mechanism of the occurrence of diarrhea in pigs is mainly the enhancement of bowel movement, digestion and secretion, and absorption dysfunction. To sum up, there are the following three factors:
1. Intestinal movements such as bacterial toxins, viruses, parasites, chemical toxins, stress, and feed quality can cause irritation of the digestive tract, increase gastrointestinal motility, and reduce the chances of complete digestion and absorption of body fluids. Causes diarrhea.
Second, the secretion of abnormal intestinal toxins produced by enterotoxigenic E. coli, which keeps the adenylase enzyme in the state of activation, continue to produce excessive cyclic adenosine monophosphate, leading to excessive secretion of mucous intestinal mucosa, fluid accumulation in the intestine and diarrhea.
Absorption causes intestinal villus cells to become infected with virus infections, such as swine epidemic diarrhea virus. Its intestinal absorption weakened, which reduced the absorption of water in the diet and the lack of activity of the enzymes, but increased the undigested food and osmotic pressure and caused severe watery diarrhea in the pigs.
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