New Therapy for Porcine Necrotizing Dermatitis

Epidemic characteristics: pig necrotizing dermatitis caused by necrotic bacilli, its infectivity is very strong. In the hot and humid weather every year, piglets, shelf pigs, boars and sows are prone to the disease. The disease occurred in the whole litter, and there was interactive infection between piglets and sows, but more piglets were infected by sows. At the beginning of the disease, systemic symptoms are not obvious, severe patients with elevated body temperature, less food or loss of appetite, weight loss, often die of cachexia, do great harm to the profession. Characteristics of the disease: first of all, red papules with large grains of rice appear on the skin of the body surface, often scratching, and the papules develop into nodules of dry scabs, hard swelling. Then subcutaneous tissue necrosis and ulceration and rapid expansion, the formation of cystic necrosis focus, depilation, exudation, skin color whitening, tissue necrosis and dissolution, the formation of gray-yellow or gray-brown malodorous wound fluid, and finally break out, but the wound edge is uneven, the wound bottom is uneven; this kind of necrotic focus often occurs in 4 to 5 places, more than a dozen places, even all over the body.

In a few diseased pigs, the lesions can reach as deep as muscles, tendons, ligaments and bones, resulting in abdominal and chest perforations, some limb decay, some ear and tail trunk necrosis, and finally peeling off from its edge.

The above lesions mostly occur in the side of the body, buttocks and neck of pigs, and sows can also occur in nipple and breast skin necrosis, or even breast necrosis.

New treatment:

1. For herds of pigs, sick pigs should be quarantined immediately.

two。 Local treatment. Because the sick pig itches, the treatment does not resist.

3. Enema with sulfonamides. For the first time, the maintenance dose was 0.14 g / kg at a dose of 0.2 g / kg body weight, twice a day for three consecutive days. Operation: slowly pour cold water into the pig rectum with a small stomach tube to remove feces and cool down; after the rectal water is drained, the sulfadiazine tablets are crushed, dissolve with 150ml warm water and slowly pour into the deep rectum; pause for a moment, then rinse the residual solution in the rectum with 50ml warm water; then press the tail root, pull out the gastric tube after 30 minutes, continue to press the tail root for 1 hour, and let the pig move freely. 10% sulfonamide injection can be injected intramuscularly for prevention.

4. Symptomatic treatment. Oxytetracycline hydrochloride injection and analgin injection were injected intramuscularly.

5. Pay attention to differentiate from scabies. Pig scabies mostly occur within 5 months of age, starting from the head, and then in the ears and eyes; bleeding, scabbing, depilation due to itching, white and deep cracks in the epidermis; take disease materials, find worms can be diagnosed, it is a parasitic disease.