Spring ewes are prone to miscarriage, causing economic losses to farmers. According to many years of clinical experience, the author made the following analysis to provide reference for sheep farmers.
First, the cause of abortion
1. Disease factors. 1 acute and chronic metritis. The disease occurs in the ewes early pregnancy. Chronic metritis has no obvious clinical manifestations. When acute metritis occurs, mucus or purulent discharge from the ewes vaginal discharge, discharge more secretions when lying in the ground, and adhesion to the tail root, the color is gray or brown Yellow, ewe often urinating posture. 2 chlamydia disease. The disease is a local miscarriage of the 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 is frequent in spring 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. 3 Brucellosis. The main symptoms of brucellosis in sheep are miscarriage, which occurs 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.
2. Nutritional reasons. Spring nutritious feed, especially green feed, is in short supply. At this time, the ewes are in the gestation period or the prenatal period, and the nutritional requirements are increasing. If there is lack of nutrition such as protein, vitamins, minerals and trace elements, it will cause the body's nutrition to make ends meet. Stunting causes miscarriage.
3. improper feeding and management. Feeding moldy forage feeds, drinking frozen water, causing excessively high feeding density resulting in mutual extrusion collisions, male and female rams co-arranged in disorder, and falling during grazing can cause ewes to abortion. 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 agents may cause miscarriage in ewes.
Second, prevention and control measures
1. Treatment of acute and chronic metritis. The 0.1% potassium permanganate solution can be used to repeatedly clean the uterus, so that all the mucus in the uterus is discharged. For serious conditions, in addition to cleaning the uterus, but also the application of anti-bacterial anti-inflammatory drugs, and improve feeding conditions, intensive care, so that as soon as possible to restore the production performance of the ewes.
2. Prevent chlamydia abortion. Chlamydial chlamydia oil-inactivated sheep can be used to inject sheep with 3 ml of subcutaneous injection before pregnancy or within 1 month of pregnancy. The immunization period is 7 months.
3. Prevention of sheep brucellosis. Brucella broiler pig type 2 attenuated vaccine or Brucella broiler sheep type 5 attenuated vaccine may be used for immunization.
4. Strengthen feeding management, pay attention to feeding in the spring. Pregnant sheep are fed with compound feeds such as carrots and grass powder, and concentrate feeds and selenium supplements are properly added to enhance the body's constitution and improve 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 the hygiene of feed and drinking water, and prohibit the feeding of grass with frost and snow, bad forage and forage, and prohibit the feeding of frozen water. It is necessary to promptly remove the manure and waste forage in the barracks, and regularly disinfect the barn, pastureland, and activity venues. In the event of disease, isolation and disinfection must be done to ensure the cleanliness and sanitation of the environment. For the miscarriage of sheep to be timely isolation and processing. It is strictly forbidden to mix stocks for stocking, to practice the separation of males and females, and to evacuate the ewes at the end of pregnancy. It is strictly forbidden to see the ewes frightened and run away. 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.
5. For defecated fetuses or dead fetuses, no special treatment is required and ewes are only cared for.
6. For pregnant ewes with abortion, use compound progesterone injection as soon as possible. Each sheep uses intramuscular injection of 15 to 25 milligrams each time, once daily injection, continuous injection for 2 days.
7. When stillbirths are detained, induction or midwifery measures should be used. When the fetus dies, when the cervix is ​​not opened, the estrogen should be injected intramuscularly first, such as diethylstilbestrol or estradiol benzoate 2 to 3 milligrams to open the cervix and then pull the fetus from the birth canal.
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