Piglets born after birth are congenital tremors. Piglet congenital tremor is an infectious disease of piglet rearing caused by a long-standing natural tremor virus in nature. The disease mainly occurs in newly born piglets. The clinical features are rhythmic tremors in the extremities, head or whole body. Usually the symptoms of early birth are heavy, and the symptoms of late birth are minor. Adult pigs are occult or chronically infected. First, the popular features: The spread of the disease is vertical transmission, only infected pigs, the same susceptibility of the different breeds and their offspring, the occurrence of no obvious seasonality, the occurrence of the first production of sows, the rare occurrence of sows; Piglets born after infection with piglets do not usually develop disease. Sporadic, fatality rate of 10-30% per epidemic, fatalities per piglet is 0-100%; rehabilitation pigs often become infected, breeding boars can be infected by sick sows spread. Second, clinical symptoms: There were no abnormalities in pregnant sows, and newborn piglets tremored just after delivery to a few hours, accompanied by weakness of the hind limbs, ataxia, and some or all of the disease in one litter of piglets, but the degree of severity varied, and the general part of the disease was Symptoms are lighter. All patients had severe symptoms. Tremor shows a variety of dance movements; and tremors are persistent. The frequency of tremors is reduced in the recumbent region, and tremors stop during sleep. However, tremors appear after standing up. Dogs with severe forelimb vibrations are often dog-ridden and the piglets are difficult to move. Can not eat milk; increased by noise, frightened, chilling, excitement, etc. The disease course varies from pig to pig. Lightness usually returns to normal within 2-8 weeks. Severe tremor is often due to severe tremors or limb paralysis, paralysis, breastfeeding difficulties or starvation due to movement disorders. The piglets that have lost tremors can still re-epitrate under conditions of excitement or stress. The general prognosis of alive pigs living a week after birth is good. Third, pathological necropsy: There was no significant change in the eyes of neonatal pigs during necropsy. For histological examination of the nervous system, myelin sheath insufficiency was observed in the central nervous system, cerebellar hypoplasia, and cerebral vascular space, especially the basal hemorrhage and hemorrhage. Fourth, differential diagnosis: According to the characteristic persistent tremors or spasms of neonatal piglets after delivery, the tremors disappeared with healthy pigs. The initial diagnosis can be made. The identification of etiological diseases must be differentiated from stillbirths caused by hypoglycemia, swine fever, pseudorabies, porcine parvovirus, Japanese encephalitis, etc., and piglets that died of neurological symptoms shortly after birth. V. Prevention measures: There is no effective vaccine and special treatment for this disease. Prevention of the disease mainly relies on general health and epidemic prevention measures. Sows are not introduced from pig farms with this disease to prevent all kinds of stress stimuli. When breast milk is not eaten, breast milk must be artificially assisted or artificially breast-feeded. This will allow most diseased piglets to naturally recover and reduce death.
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