Porcine stomach ulcer refers to keratinization, erosion and necrosis of the pig's gastroesophageal mucosa, or autologous digestion to form a round ulcer surface, and even gastric perforation. The disease is more common in pigs that grow faster than 50 kg.
First, the symptoms
Sick pigs show anorexia, abdominal discomfort, abnormal bowel movements, constipation or diarrhea, stomach bleeding and black feces. Initial mild bleeding in the stomach, showing indigestion, is often not easy to detect. When the stomach is perforated, it can die rapidly with acute diffuse peritonitis.
Second, the type
The disease can be divided into recessive, chronic and acute according to the degree of disease:
1. Recessive: no obvious symptoms, growth rate and feed conversion rate are almost unaffected, and were discovered only after slaughter.
2. Chronic: The appetite is reduced or not eaten. The body surface and visible mucosa of the sick pig are obviously pale. When there is blood in the vomiting or vomiting, the back of the bow or the lying bed, lying on the side due to weakness, progressive weight loss. Constipation at the beginning, then turned into coal tar-like stool, occult blood test was positive. The condition sometimes worsens and sometimes relieves, causing digestive disorders and abdominal pain. A small number of cases have chronic peritoneal symptoms, with a course of 7 to 30 days.
3. Acute: When the disease is acute, the sick pig may suddenly die due to massive bleeding in the ulcer; some sick pigs suddenly vomit blood before and after intense exercise, mutual bites, and labor, tar-like blood in the coal, blood temperature drops, and shortness of breath, Abdominal pain is uneasy, the surface and mucous membranes are pale, the constitution is weak, and eventually died due to collapse. When a sick pig causes peritonitis due to gastric perforation, it usually dies 1 to 2 days after the onset of symptoms.
Third, diagnosis
The diagnosis of the disease is difficult, especially early diagnosis is more difficult. Diagnostic symptoms are: the stool becomes dark and the skin and mucous membranes are noticeably pale. The only way is to take suspicious feces for occult blood test, but it should be distinguished from hemorrhagic enteritis syndrome and acute swine dysentery.
Fourth, prevention
Take corresponding measures for the cause of the disease:
1. Avoid smashing the feed too fine, and the feed particle size should be above 500 microns.
2. Reduce corn content in the diet and feed less powder. 3. Add grass powder or oat hull to the feed to make the amount of crude fiber in the diet reach 7%.
4. Ensure the content of vitamin E, vitamin B1 and selenium in the feed.
5. When copper is used as a growth promoting agent, 110*10-6 zinc carbonate should be added to the feed as an anti-copper ulcer additive.
6. Mix with sodium polyacrylate at a concentration of 0.1% to 0.2% to change the physical state of the feed so that it can stay in the stomach for normal time.
7. Reduce frequent group transfer, transportation, and drive to prevent pigs from biting each other.
8. Keep the pig house warm in winter and cool in summer, strengthen ventilation, ensure proper breeding density, and have enough space in the pig house to facilitate the free movement of pigs.
Fifth, treatment
1. Principle of treatment: The principle of treatment is to eliminate the pathogenic factors, neutralize gastric acid, and protect the gastric mucosa.
2. Treatment
(1) For sick pigs with mild symptoms, the environment should be kept quiet and the stress response should be alleviated. Sedatives can be injected. For example, chlorpromazine hydrochloride is used, and pigs use 1 to 3 mg per kilogram of body weight.
(2) neutralizing gastric acid to prevent the gastric mucosa from being invaded, and the acidity of the stomach contents may be lowered by using an antacid such as aluminum hydroxide, magnesium silicate or magnesium oxide.
(3) Protect the ulcer surface, prevent bleeding, promote healing, and apply 5~10 grams of bismuth nitrate before feeding, 3 times a day, or feed citrate protein, 2~5 grams each time, 2~3 times a day. , for 5 to 7 days.
(4) In order to maintain the normal emptying of the restaurant, 5 to 20 grams of sodium polyacrylate can be dissolved in water every day, or mixed in the feed at a ratio of 0.5 to 5% for 5 to 7 days.
(5) If the sick pig is extremely anaemic and confirmed to be gastric perforation or diffuse peritonitis, the therapeutic value is lost and it should be eliminated early.
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