Lamb dysentery is an acute infectious disease characterized by diarrhea in the lamb. It mainly affects lambs less than 7 days of age and has a high mortality rate. 1. Pathogens and Diseases The pathogenic microorganisms that cause lamb dysentery are mainly Escherichia coli, Salmonella, Clostridium perfringens, Enterococci and Others. These pathogenic microorganisms can be mixed or infected individually to cause the disease in lambs. The route of transmission is mainly through the digestive tract but can also be transmitted through the umbilical cord or wound. The occurrence and prevalence of this disease is related to malnutrition of pregnant ewes, improper nursing of lambs, abrupt changes in the climate during the lambing season, and the cold and dampness of sheep houses. 2. Symptoms The natural incubation period is 1-2 days. Slightly raised or normal body temperature, lack of energy, inactive action, rough hair, isolated on the side of the sheep's nest, bowing down, do not want to eat milk, swollen eyelids, rapid breathing, rapid pulse, sustained diarrhea soon, Faeces become stinky and begin to become pasty and later become watery, containing bubbles, mucus, and blood. Feces are of different colors, yellow, green, yellow-green, gray and other colors. In the later stages of illness, death is often caused by weakness, dehydration, and acidosis. The course is usually 2-3 days. Some sick lambs also have a small amount of diarrhea and row of thin excrement, and they mainly exhibit neurological symptoms, soft limbs, lying in the ground, shortness of breath, mouth foaming, head restraint, temperature drop, and finally coma. The necropsy main lesions were catarrhal hemorrhagic inflammation in the digestive tract, intestinal mucosa, blood sample contents, intestinal swelling, and intestinal ulcers. 3. Prevention (1) It is necessary to strengthen the feeding and management of pregnant ewes and nursing ewes, and maintain the good constitution of pregnant ewes so as to produce a robust lamb. Do a good job of lambs and lambs, keep the delivery room clean and dry, and often disinfect. Before the ewes come into production, the contaminated hair around the vulva, inner thighs, and around the breasts should be cut off and disinfected. In the winter and spring seasons, new lambs will be kept warm. (2) Lamb dysentery bacilli can be used to vaccinate pregnant ewes twice in the areas where lamb dysentery often occurs. For the first time, 2 ml of subcutaneous injections are given 25 days before delivery, and the second is 15 days before delivery. Subcutaneous injection of 3 ml gives a 5-month immunization period. (3) Drug prevention. In the 12 hours after the birth of the lamb, 400,000 international units of penicillin were intramuscularly injected once a day for 57 days; or 0.15-0.2 grams of oxytetracycline once a day for 5-7 days to prevent the disease. effect. (4) Aureomycin 20-40 mg, dissolved in 2-4 ml of sodium glycinate, intravenously. (5) Sulfamethoxazole 0.5 g, bismuth subnitrate 0.2 g, citric Acid protein 0.2 g, baking soda 0.2 g, and water, mix, take once, 3 times a day. At the same time intramuscular injection of 200,000 international units of penicillin, once every 4 hours, until healed. (6) oral Bailong San (Pulsatilla at the end of two, gentian at the end of a mixed study), once a day, each serving 3 grams; or garlic smashed half a spoon, vinegar, spoon, mixed once Internally, twice daily. At the same time intramuscular injection of penicillin 200,000 international units, 3 times a day. (7) Furazolimol is taken orally 0.01g/kg body weight, twice daily; or fluocin orally taken orally, 7-10mg/kg body weight twice daily. Use 5-7 days. China Agricultural Network Editor
Food Sweeteners Chemical Reagent Co., Ltd. , http://www.nsauxiliaryagent.com