The formulation of late invasive classical swine fever?

The swine fever of piglets born to sows infected with recessive classical swine fever is called advanced invasive swine fever. It's the first time I've heard of it. Raising pigs-- I think it's more accurate to call it reproductive disorder classical swine fever-- try it with this serum. There doesn't seem to be any good way! -- this is the first time I have heard this phrase-- diagnosis and treatment of reproductive disorders in the treatment of swine disease. Thursday, July 31, 2008. 02: 00 p.m. 43 1 incidence in recent years Classical swine fever characterized by abortion, stillbirth and the death of newborn suckling pigs has been continuously found in the work of disease prevention and control, which is also very harmful. A pig farm in Tieling has successively found the phenomenon of miscarriage of sows, stillbirth and a large number of deaths of newborn suckling pigs in a short period of time. The pig farm has been treated with a variety of antibiotics and sulfonamides, but without effect. It is understood that classical swine fever continues to occur in this pig farm, and it mostly occurs in piglets and post-weaning piglets. Japanese encephalitis and parvovirus infection have also occurred and have been controlled by vaccination. According to incomplete statistics, nearly 300 abortions and stillbirths occurred in the pig farm during the onset of the disease, accounting for 21.1% of the total litter size. The mortality rate of newborn suckling pigs is also as high as 16.6%. From the occurrence and prevalence of the disease, abortion and stillbirth appeared in June, and increased month by month. Pregnant sows rarely have symptoms, and some only have a slight loss of appetite at 2-3 days before delivery and recover immediately after delivery. There are fewer miscarriages and more stillbirths, which are characterized by late fetal death. The production time is often prolonged for about 24 hours, and most of them are stillborn, and in severe cases, the whole litter is stillborn, some of which have been mummified, some edema, and some epidermis bleeding. Newborn suckling pigs usually develop at 10-24 hours postpartum, with clinical manifestations of anaesthesia, erect dorsal hair, fear of cold, reluctance to move, systemic tremor and common stain-like changes in the ear and ventral medial side. Some showed yellow and thin feces, others vomited and died from several hours to 48 hours after onset. (2) the pathological changes of 40 stillborn and sick piglets were basically similar. There are common patches of congestion and punctate bleeding on the lower surface of the renal capsule (small as a needle tip, large with 1~2mm), severe bleeding in the renal pelvis and renal breast head, non-swollen spleen, often bleeding with mound spots on the surface, and hemorrhagic infarction with serrated protuberances on the edge of the spleen. The whole body lymph nodes are swollen, congested, dark red, succulent, diffuse or peripheral bleeding, there are still gray-white areas in the center, forming a red-and-white marble appearance, especially in mesenteric lymph nodes; bleeding spots are also common in larynx and bladder mucosa; there are bleeding spots and plaques in the lungs; epicardial hemorrhage, especially in the left atrial appendage and coronal sulcus; meningeal vascular congestion In some cases, subcapsular and parenchymal hemorrhage of the liver, gallbladder filling and small bleeding of gallbladder mucosa were seen; in some cases, gastric mucosa was congested and bleeding, with mild to severe mucosal ulceration, especially in the fundus and pylorus of the stomach; in some cases, gelatinous edema appeared subcutaneously in the head and neck and groin; in some cases, there were a large amount of pleural effusion and ascites in the chest and abdominal cavity, showing red turbidity. (3) the number of white blood cells in laboratory diagnostic blood examination was lower than that of normal pigs of the same age. Bacteriological examination of blood and lymph nodes were all negative. Brucella rapid plate agglutination test showed no agglutination. Tissue compression of classical swine fever fluorescent antibody examination showed bright green fluorescent plaques. 4 Prevention and control measures and effects the above incidence, pathological changes and laboratory diagnosis showed that the reproductive disorder of sows was caused by classical swine fever virus. For this reason, the farm not only strengthened the isolation and disinfection treatment according to the routine, but also adopted measures to strengthen the antibody level of sows. The sows were vaccinated with 4 doses of classical swine fever vaccine 2-3 weeks before breeding, and the feeding management was strengthened at the same time. Stop using drugs to add feed and vaccinate other vaccines to make sows have strong immunity before mating to prevent infection during pregnancy. Since then, there has been no reproductive disorder in the sows. -- not studying pig disease. But the name of pig disease-- thank you for the case provided by a friend on the sixth floor-- remember that there is something in this infectious disease book. I don't really want to talk about it. It's really difficult and complicated. Why not simplify it.-I don't know. Sometimes different disease names can show the level-it is meaningful that this post was finally edited by Jiahe people at 17:28 on 2009-11-26 17:28. The method of "sows are vaccinated with 4 doses of classical swine fever vaccine 2-3 weeks before breeding" has been done all the time, but the results are different. The difference is that all other vaccines have been stopped. Could this be the crux of the problem? I feel that this is a measure taken against the case at that time. Do this if necessary. But it shouldn't be done after the disease is over. It is better to follow the normal immunization procedure. Do a good job of swine fever twice a year for sows and pseudorabies 3-4 times a year. The sow is basically fine.