Prevention of Porcine Parvovirus Disease
Porcine parvovirus disease is a common disease caused by porcine parvovirus and exists in many large-scale pig farms in China.
1. Popular characteristics. The pig is the only susceptible animal. The disease is mainly inflicted on the primiparous sows. The gilts that have not been vaccinated are almost always affected. The gilts that have been exposed to porcine parvovirus disease have a certain degree of immunity. Infection immunity occurs basically without this phenomenon and is generally endemic or distributed; the virus can be transmitted to the fetus through the placenta.
2. Clinical symptoms. The only clinical reaction was sow reproductive failure. When the first-born sows were infected with the virus before mating, there was no clinical abnormality. Delayed estrus or long maturation; but sows produce mummified fetuses, stillbirths, and weak piglets. Due to different viral infection times and different times of fetal death, the size of the mummy is very inconsistent. Early pregnancy (10-30 days) embryos in pregnant sows Death is absorbed by the mother; when infected from 31 to 70 days of pregnancy, it mainly causes fetal death and mummification; the fetus infected after 70 days of pregnancy, although no abnormalities after birth, may be a source of infection but may be a source of infection. Not great.
3. Pathological necropsy. The sow's endometrium is mildly inflamed, and the placenta is partially calcified. The fetus is dissolved and absorbed in the uterus; infected fetal developmental disorders and poor growth show fetal hyperemia, hemorrhage, edema, and necrosis.
4. Control points. Normally, porcine parvovirus oil adjuvant inactivated vaccines were used to prevent injections in order to obtain stable and longer-lasting antibody levels. That is, gilts and boars were immunized after weaning, 2 ml/head, and immunized once a month later or 2 weeks before mating, 2 ml/head. When porcine parvovirus occurs or erupts, vaccinated with porcine parvovirus attenuated vaccine is urgently needed in order to quickly and effectively establish immune protection.
There is currently no effective drug treatment for the disease. When the outbreak is found, the pens should be thoroughly disinfected and the aborted fetus should be treated innocently; the veterinary dipexin tablets should be given orally (maximum cannot exceed 14 in one batch) or the intramuscular injection of 0.25% can be used for the over-produced sows. 10 ml, artificial labor, speed up the reproductive cycle, generally the next child can be normal production.
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