How to treat necrotic dermatitis in pigs? Introduction to treatment methods
Epidemiological characteristics: Necrotic dermatitis in pigs, caused by Fusobacterium necrophorum, is highly contagious. In the hot and humid season each year, piglets, growing pigs, boars and sows are all susceptible to this disease. It often affects the whole litter and the whole herd, with piglets and sows infecting each other, but sows infect piglets more often. At the beginning of the disease, systemic symptoms are not obvious; in severe cases, body temperature rises, appetite is reduced or completely lost, and the animal becomes emaciated, often dying from cachexia, causing considerable harm to the @#@227@#@ industry. Disease characteristics: First, rice-grain-sized red papules appear on the skin surface, often with itching; the papules then develop into scabbed nodules with hard, firm swelling. Subsequently, the subcutaneous tissue becomes necrotic and ulcerated and spreads rapidly, forming cystic necrotic foci; the affected area loses hair, oozes, and the skin color turns white; the tissue within the foci becomes necrotic and dissolves, forming a grayish-yellow or grayish-brown foul-smelling wound fluid that finally ruptures and flows out, but the wound edges are uneven and the wound base is irregular; such necrotic foci usually occur in 4 to 5 places, sometimes a dozen or more, and may even cover the whole body.
In a few affected pigs, the lesions can reach deep into the muscles, tendons, ligaments and bones, causing abdominal perforation and thoracic perforation; some have sloughing of the extremities; others have dry necrosis of the ears and tail; finally these slough off from their edges.
The above lesions mostly occur on the sides of the body, the buttocks and the neck of pigs; in sows they can also occur as necrosis of the skin of the teats and udder, and even necrosis of the mammary glands.
New treatment plan:
1. For herd pigs, immediately isolate the affected pigs.
2. Local treatment. Rinse the necrotic foci on the body surface of the affected pigs with warm water, break open the necrotic foci with a brush, remove the necrotic tissue, then use a syringe fitted with a No. 6 intramuscular injection needle to draw up 0.1% PP water and spray it onto the necrotic lesions. Because the affected pigs itch, they do not resist during treatment.
3. Administer sulfonamide drugs by enema. For the first dose, use 0.2 grams per kilogram of body weight, with a maintenance dose of 0.14 grams/kg, twice a day for three consecutive days. Procedure: Use a small stomach tube to slowly infuse cool water into the pig's rectum to clear feces and lower body temperature; after the water in the rectum has drained away, crush sulfadiazine tablets, dissolve them in 150 milliliters of warm water and slowly infuse the solution deep into the rectum; after a short pause, use 50 milliliters of warm water to flush the remaining medicinal solution into the rectum; then press the base of the tail, withdraw the stomach tube after 30 minutes, continue pressing the base of the tail for 1 hour and then release it, allowing the pig to move freely. Intramuscular injection of 10% sulfonamide injection can be used for prevention.
4. Symptomatic treatment. Use oxytetracycline hydrochloride injection, analgin injection, etc. for intramuscular injection.
5. Note the need to distinguish it from sarcoptic mange. Sarcoptic mange in pigs mostly occurs in pigs under 5 months of age, starting from the head and then affecting the ears and eyes; due to rubbing and itching, there is bleeding, scabbing and severe hair loss, the epidermis turns white and has deep cracks; collecting diseased material and finding the mites can confirm the diagnosis; it is a parasitic disease.