How to reduce the harm of postweaning multisystemic wasting syndrome in pigs?

(agricultural Wealth Network) how to reduce the harm of post-weaning multiple systemic wasting syndrome (PMWS)?-- Porcine postweaning multiple systemic wasting syndrome (PMWS) is a viral disease of pigs infected by circovirus-2 (PCV-2). In recent years, it has caused considerable economic losses to countries with developed pig industry. It has become one of the main diseases endangering pig production. -- the common incidence of PMWS occurs during lactation, especially in 5-12-week-old and 6-8-week-old pigs. Generally, the disease begins 2-3 days or a week after weaning. In acute pigs, the case fatality rate can reach 10%, but the mortality rate is often greatly increased due to concurrent or secondary bacterial and viral infections, and the case fatality rate can reach more than 25%. Clinical symptoms and pathological changes the most common clinical symptoms of post-weaning multisystemic failure syndrome in pigs are progressive weight loss or growth retardation, dyspnea, inguinal lymph node enlargement, diarrhea, anemia, jaundice, occasional cough, fever, gastric ulcer, central nervous system disorders and so on. Died suddenly. Common lesions: lung swelling, interstitial widening; significantly enlarged lymph nodes, wet section, visible bleeding; kidney swelling, gray-white; mild swelling of liver and spleen; pleurisy, peritonitis, pericarditis, arthritis and so on if there are other pathogens complicated or secondary infection. Control measures there is a great deal of evidence that the stimulation of the immune system is an important factor in stimulating post-weaning multiple system failure syndrome in pigs, and there is at least a short-term immunosuppression in infected or infected pigs. Because of the specificity of the virus, there is no effective vaccine to prevent PCV-2 infection, so the most important way to deal with post-weaning multisystemic wasting syndrome is how to reduce its harm and loss. Combined with the recent control experience of some diseased pig farms and the actual pig production situation in China, the following control measures are put forward: vaccination of major epidemic diseases and strengthening the feeding and management of pigs. Reduce the stress factors of pigs: strictly implement the all-in-all-out system Integrate the sanitary disinfection work into the pig production process, including personnel, vehicles, environment, pigs, etc., and pay attention to every detail of the disinfection work; do a good job of ventilation and ventilation in the pig house, improve the air quality of the pig house, and reduce the concentration of ammonia; keep the pig house dry and reduce the feeding density of the pig herd. Improve the nutrition level of pigs: due to the decline of immune function of pigs caused by PCV-2 infection, nutrition is an important factor affecting PMWS. By increasing the levels of protein, amino acids, vitamins and trace elements in pigs, the incidence and loss of PMWS can be reduced to a certain extent, the quality of feed can be improved, a small amount of liquid vitamins (Victoria) can be fed, the feed intake of weaned pigs can be increased, and pigs can be fed with wet feed or porridge to ensure adequate drinking water. To adopt a perfect drug prevention scheme, in view of the current incidence characteristics of PMWS in pigs in China and its application effect in actual production, it is suggested to apply a more effective drug prevention scheme: sub-pig medicine: lactating pigs are injected with Fuhong Changxiao (long-acting oxytetracycline, 20%, 0.5ml ~ 1ml each time) during tooth cutting, tail amputation or castration, and weaning. One week before weaning to one month after weaning, mix with antiviral powder No. 1 (1000 grams per ton and amoxicillin (300grams per ton), and pigs with Victoria (500ml per ton) with water. Sow medication: one week before and one week after delivery, antiviral No. 1 powder (1000 grams per ton and amoxicillin (300g per ton) was added to the feed, and Victoria (500ml per ton) was mixed with water for pigs.