How to reduce the stillbirth rate of newly born sows
In recent years, the stillbirth rate of newly born sows has gradually increased. Some still have a stillbirth rate of 70% to 80%, and the economic loss is very large. The reason for the high rate of stillbirth in the primiparous sows is that the primiparous sows have poor resistance to reproductive disorders. At present, Japanese sow encephalitis, parvovirus disease, and pseudorabies are the most severely affected in sow reproductive disorders. Japanese encephalitis B is transmitted by mosquitoes, flies and cockroaches, and it usually occurs in late summer and early autumn. When toxemia occurs in pregnant sows, infection of the fetus through the placenta causes miscarriage. Early death of the fetus resulted in the formation of mummies (dry corpses). Most of the later deaths were due to stillbirth. The stillbirths were not corrupted. Some had systemic edema, chest cavity, and abdominal cavity water; some nose and body were blue-purple, and the sows (more than 2 children) had With certain immunity, the number of stillbirths is reduced. Parvovirus is transmitted through contact. The sow was infected 35 days before the pregnancy and most of the dead embryos were absorbed by the sow, resulting in a decrease in the number of live piglets. When the sow was infected with the disease within 3 months of pregnancy, some or all of the fetus died. Pseudorabies is a communicable disease caused by livestock and wildlife. It is transmitted by rodents and can also be transmitted through the respiratory tract, digestive tract, breastfeeding, and natural mating. It is prone to winter and spring, and some sows have a miscarriage or output. Mummified fetuses, stillbirths, and fetal rots are foul and odors, sows often have dark brown mucous or “flowing whiteâ€. In addition, swine fever virus, porcine transmissible gastroenteritis virus, myocarditis virus, swine adventitious virus, and swine flu virus can cause sows to abortion or stillbirth under certain conditions. Some bacterial infectious diseases can also cause Pig abortion, such as pasterellosis, leptospirosis, listeriosis, swine toxoplasmosis, swine chlamydia disease, swine eperythrozoonosis, abortion due to poor feeding and management also occur from time to time. Such as excessive density, crowding, moldy food, drinking ice water, habitual abortion, sow scooping, crawling, jumping, chasing, bruises, pig-raising belly, thunder or loud noise, etc. May cause miscarriage or stillbirth in sows.
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