The general performance of pregnant sheep abortion
When the ewes abruptly have a miscarriage, there is usually no characteristic behavior before the birth. The ewes with slow onset have poor mental performance, absent appetite, abdominal pain, uneasy rest, urgency, and the amniotic fluid outflows the amniotic fluid. If the cause is the same in the same group, abortion will occur one after another until all the affected ewes have abortions to stabilize. If it is traumatic disease, ewes often show recessive abortion, that is, the fetus does not discharge into the body, dissolves on its own, or forms stillbirth. However, because of the degree of trauma, the injured fetus often suffers from fetal membrane hemorrhage and exfoliation. Discharge into the body after hours or days.
Causes of Ewe Abortion
Disease factors Chlamydia disease: This disease is a local abortion disease in sheep. After the pregnant ewes are infected with Chlamydia, Chlamydia grows and reproduces on the chorionic membrane of the placenta, causing inflammation of the affected area, which results in the early production of deciduous lambs. The disease occurs frequently from February to April each year, and the incidence of ewe in the 2-year-old is high. Ewes usually have no characteristic premonitory abortions. They only show abnormalities, and have abdominal pain. They often have buzzing, and they die of dying. Brucellosis: The main symptoms of Brucellosis are miscarriage, occurring in ewes 3 to 4 months after pregnancy. The disease has a high abortion rate when it first occurs in the flock, and most ewes can gain immunity and heal themselves later. Ewe and fetus own causes: fetal malformations, fetal organ development abnormalities, fetal membrane edema, too little or too little fetal water, metritis, placenta inflammation, and ewe suffering from liver, kidney, lung, gastrointestinal diseases and neurological Diseases and the like can destroy the pregnancy process and cause miscarriage.
Nutritional reasons Winter has a long submerged period, and nutritious feeds, especially green and green fodder, are in short supply. At this time, the ewes are in the gestation period or prenatal period, and the nutritional requirements are increasing. If there is lack of protein, vitamins, minerals, trace elements and other nutrients. , will cause the body's nutrition to make ends meet, fetal dysplasia and lead to miscarriage.
Improper feeding and feeding of mildew forage feed, drinking ice water, sudden changes in the climate, excessive feeding density caused by mutual extrusion collision, male and female mutts in the same circle in disorder, falling during grazing can cause ewes miscarriage. Pregnant ewes are ill and fail to pay attention to treatment methods and dosages. For example, a large number of cathartics, diuretics, uterine constrictors and other potent pharmaceuticals may cause miscarriage in ewes.
Strengthen vaccine prevention against chlamydial abortion: Chlamydial yolk inactivated vaccine can be used for sheep chlamydial oil adjuvant, and 3 ml of subcutaneous injection is given before ewe pregnancy or within 1 month after pregnancy. The immunization period is 12 months. Prevention of Brucellosis: Brucella porcine type 2 attenuated vaccine or Brucella genus type 5 attenuated vaccine can be used for immunization. Brucella porcine type 2 attenuated virus vaccine can be used for immunization against drinking water. The dose is 10 billion to 200 billion viable bacteria. It can be divided into two servings (2 days served). The dilution ratio of the vaccine is 1:10, the immunization period is 6 to 12 months, and the vaccine is used once or twice a year to drink 3 to 5 years. Brucella serotype 5 attenuated vaccine can be used for immunization or aerosol immunization. Aerosol immunization The dose of bacterin was calculated at a rate of 5 billion viable bacteria per cubic meter in the room. The dose of immunization against fog was 5 billion live bacterins per sheep. After indoor immunization, the sheep need to be rushed into the room, close the doors and windows, and spray from the horizontal line about 1 meter higher than the sheep's head to the four sides. The bacterin should be left for another 20 minutes after spraying, so that the sheep can freely inhale and then release the sheep. When the open air operator holds the atomizer, the compressed air is 2.5-3.5 kg per square centimeter. The diluted bacterin is sprayed through the atomizer. The sprayer is equal to the height of the sheep and sprays evenly toward the sheep's head. The bacterin is sprayed. After that, the sheep can stay in the column for another ten minutes.
The treatment of acute and chronic metritis metritis occurred in the early stages of ewes pregnancy. Chronic metritis has no obvious clinical manifestations. When acute metritis occurs, mucus or purulent secretions flow from the vagina of the ewes. Excreted secretions are more when lying in the ground and adhere to the tail base. The color is grayish or brown. Yellow, ewe often urinating posture. Can be used 0.1% potassium permanganate solution (0.1% of the rebaudioside, 0.1% of iodine solution, 1% of alum water, 3% to 10% of hypertonic saline can be) repeatedly washing the uterus, so that intrauterine The mucus was completely discharged. In addition to the application of antibacterial and anti-inflammatory drugs to serious illnesses, it is also necessary to use a strong heart, stomach, calcium supplements for the disease, and to improve the feeding and intensive care so as to quickly restore the production performance of the ewes.
Intensive feeding and management should be supplemented in winter and spring, and fall should be carried out well in autumn: Feed more feeds such as carrots and grass powder to pregnant sheep, and add concentrate feed and additives containing selenium to increase sheep's physique and disease resistance. In the second month of ewes' pregnancy, supplementation must be strengthened. High-quality hay and concentrates can be supplemented at this time. Attention should be paid to the supplement of protein, calcium and phosphorus. Feed energy level should not be too high, do not raise the ewes too fat, so as to avoid adverse effects on the fetus. Pay attention to feed and drinking water hygiene: Feed fodder with frost grass, mildew, and forage should not be fed, and drinking of drinking water should be prohibited. Strengthen sanitation and disinfection: Remove the excrement and waste forage in the barracks in a timely manner, and regularly disinfect the barn, pastureland, and activity venues. In case of illness, isolate and disinfect the sanitarium to ensure the environment is clean and sanitary. For the miscarriage of sheep to be timely isolation and processing. Should pay attention to miscarriage: the prohibition of mixed stocking, the implementation of the male and female group and the ewe in the late pregnancy single captivity, is strictly prohibited frightened hen ran. Grazing and grazing should be slow and steady to prevent crowding and slipping, and to prevent skipping cliffs and running ditch. It is better to grazing on flatter pastures. Keep the sheep house warm, dry and well ventilated. For ewes that may produce twin lambs and newly-wedted ewes, it is necessary to strengthen feeding and management.
Treating ewes with miscarriage symptoms, the compound progesterone injection can be used as soon as possible. Each sheep uses intramuscular injection of 15 to 25 mg each time, once daily injection, continuous injection for 2 days. If the fetus has not been discharged after death, and the ewes have been opened, the ewes can be injected intramuscularly with 1 to 2 ml of pituitrin.