The issue of breeding barriers for sows has always been a problem that plagues owners of pig farms. Sows are not estrus, long-term estrus after weaning, regrowth, miscarriage, stillbirth, etc. Many pig farms continue to occur for better control and prevention. In this type of problem, we have provided some analysis of the causes of sow reproductive disorders in the summer, and we hope to learn from the majority of pig owners. First, the main performance of sow reproductive obstacles in summer farms Sow miscarriage, stillbirth, non-estrus, sympathy, few litter size, weak litter, etc. Common problems in sow production: postpartum triad (mastitis, endometritis, agalactia); repeated infertility, pseudopregnancy; no estrus, ecstasy; yellow and white piglets; Not neat. Second, causes of sow reproductive disorders analysis The causes of reproductive problems in sows in summer include: mycotoxin, blue-ear disease, parvovirus, Japanese encephalitis, pseudorabies, endometritis, and high-temperature heat stress. 1. The control of mycotoxins has become the primary task for the control of reproduction barriers and the control of swine diseases in pig farms! The mycotoxin should be re-recognized now. In recent years, after the onset of pigs, clinical diagnosis and laboratory tests often lead to the following results: Blue ear disease, circovirus, swine fever, Haemophilus parasuis, etc. stable. After several twists and turns finally understand that the mycotoxin blame! Mycotoxin harm to sows: pregnant sows showed miscarriage, stillbirths, mummified children and postpartum estrus is not normal; newborn piglet eight legs, mortality increased. Young sows: The young sows have swollen vulva, increased uterine volume and weight, and show signs of estrus or labor. Lactating sows: The performance of a gradual antifeedant, the performance of persistent estrus or prolonged estrus cycle, affecting the survival rate of suckling pigs during lactation. Sows experience rectal and vaginal prolapse. 2. The blue ear disease is the pig farmer's most worried pig disease. The main manifestations are: miscarriage, stillbirths, and weak babies during the second trimester; common blue ear disease: fever or no fever, anorexia, flu-like symptoms, skin redness, reproduction obstacle. Highly pathogenic blue ear disease: Vomiting, neurological symptoms. Blue Ear disease drug health program: Sow health care: Add 1,000 grams of Wooni Kang + Fukansan 500g per ton of formulated feed, once a month for 7 days each time; Weaned pigs, nursery pigs: Add 500g of round orchids per ton of formulated feed 1000 grams, easy to spread 1000 grams, used for seven days; nursery late or medium-sized pigs: 1000 grams of Wonikang, 400 grams of lung epidemic cleared per ton of formulated feed, used for seven days. 3. Abortion and mummification of pregnant sows caused by pseudorabies in pigs, mainly due to stillbirth. The number of neonatal piglets died (incidence on the second day, peaking at 3-5 days), and weaned piglets died (morbidity 20-40%, mortality rate 10 - 20% - neurological symptoms, diarrhea, vomiting), infertility in breeding pigs (during spring, difficulty in sow breeding in autumn, return rate up to 90%), boar swollen testis, atrophy, etc. The disease is controlled mainly by vaccine immunization. Sows: positive populations are immunized 3-4 times a year, negative populations are immunized twice a year; gilts are immunized twice before mating; boars are immunized twice per year; pigs: first Free: Intranasal 1-3 days old; Second exemption: 8-10 weeks old intramuscularly. 4. Porcine Parvovirus: Pregnant sows, once infected with PPV, can develop viremia and cause reproductive problems; placental infections occur with the bloodstream to the placenta, producing most of the stillbirths, mummies, and weak larvae; the sows themselves often There are no obvious symptoms; the performance of the sows during the period of pregnancy is different. Immunization procedures: gilts: generally 2 times, immunized twice at intervals of 3-4 weeks before mating; sows raised: if necessary, immunized once after weaning; boars: 6-7 months 2-3 weeks Inoculate 2 times, and then inoculate once a year. 5. Swine encephalitis B occurs at the end of the summer and early fall. This is determined by the media, mosquitoes. Symptoms: elevated body temperature (40~41°C), sleepiness, unwillingness to walk, loss of appetite, but hi drinking water, dry stools, and ineffective antibiotics. Abortion of pregnant sows, unexpired fetuses, stillborn or mummified, pre-producing pigs, some normal, some limbs can not walk, and some poor health, not a few days of death. The boar is mainly orchitis, with severe swelling, which can be 2 to 3 times normal, and is often swollen on one side. Preventive methods for vaccination, while doing a good job of mosquito prevention and mosquito control. Third, sow postpartum inflammation control 1. Molybdenum and milk anti-120 prevention are added to the feed; 2, intramuscular injection of amoxicillin sodium or ceftiofur sodium; prevention of endometritis with net uterus promote pregnancy perfusion, especially in summer. Fourth, the sow is not estrus, repeated infertility measures: 1, conventional adjustment: exercise, feed, light, boar stimulation (or boar semen, urine) 2. Nutritional regulation: Including restriction and feeding (as the case may be), no feeding of mildew, no abuse of demycotic 3, endometritis, postpartum triad: use "treatment, conditioning, aphrodisiac" three steps: (1) Treatment: Systemic treatment: cephalosporin + general rule, intramuscular injection; local treatment: uterine perfusion: net palace pregnancy promoting fluid 200ml + oxytocin 4ml, usage: first irrigation liquid irrigation, to the vulva began to flow out syrup. (2) Conditioning: Mixing: Molinex + Powerful Detoxification, Usage: According to the instructions, feed the entire estrus interval. (3) Aphrodisiac: The first three days before the heat, the aphrodisiac was fed for 4 days, 1 pack/day, and the pig was given a chloropregnenol sodium (simultane, auxin, PG600) on the third night. 4, hormone regulation: (1) Chlorprostone sodium 200-300 ug + maternal serum (PMSG) 1000 IU (with hair), estrus 7 days after injection. (2) If it is not estrus, injections of aphrodisiac or chloroprednisone may be given 1 to 10-12 days after the injection; (3) Note: gilts are naturally estrus after breeding twice. 5, estrus reluctant to mating: intramuscular injection of aphrodisiac midwifery, but also for boar or artificial insemination; or mandatory thick mucous mating. 6, to strengthen the pig's body surface and environmental sanitation work.
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