Studies have shown that porcine dermatitis nephritis syndrome (PDNS) is caused by circovirus (PCV2) and was first documented in the United Kingdom. It mainly affects the skin and kidneys and is increasingly becoming a skin-impaired disease. Although the mortality rate of this disease is low, the disease rate is high and the disease duration is long, especially in summer and autumn, which seriously affects the growth and development of pigs and causes significant economic losses to the pig industry.
First, the symptoms
The porcine dermatitis nephritic syndrome (PDNS) mostly occurs in growing and finishing pigs from 8 weeks to 20 weeks of age. The pig's spirit is euphemism, weight drops rapidly, acute mosquito-like bite-like red, pink and even cyanotic rashes appear on the skin of the ear, back, lower abdomen and hindquarters buttocks, often fused into strips and plaques, round Or irregular uplift, some swollen plaques in the center of the swollen pigs, later crusts turn dark brown or black necrosis, urine is yellow. The necropsy shows that the kidney is in khaki anemia, and the renal capsule is difficult to peel. The cortex is brittle and fragile. The early kidney is enlarged and pale, and the texture is firm in the later period. The discolored spots and sizes can be seen through the kidney capsule. White necrosis, bladder, ureter accumulation, lymph node edema, khaki, intestinal mucosal bleeding.
Second, diagnosis
The disease is mainly based on clinical symptoms and pathological changes in necropsy to make a preliminary diagnosis, if further confirmation of the need for serological methods such as ELISA and etiological methods such as PCR methods.
Third, prevention and treatment
As there is no effective commercial vaccine for the prevention of swine dermatitis nephritic syndrome, there is no specific drug to treat the disease. At present, more comprehensive measures such as symptomatic treatment, control of secondary infections, and improvement of self-resistance of diseased pigs have been adopted to alleviate the symptoms, and the sick pigs have been recovered by their own immunity as early as possible.
After many clinical treatment practices, the author summarized a set of effective programs for the prevention and treatment of porcine dermatitis nephritis syndrome (PDNS), which are now described as follows:
The specific treatment plan: severe pig weight amoxicillin 15mg / kg body weight + Houttuynia 5ml ~ 10ml / head + dexamethasone 5mg ~ 12mg / head, combined with intramuscular injection once a day for 3 days.
For the sick pigs with less prophylaxis or sickness (can eat) mixed feed: 1 bag per 500 kg feed + water-soluble amoxicillin 500g + antiviral I powder (main ingredient is Astragalus membranaceus extract) for 1 week.
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