Diseases that can easily cause high fever in pigs and their prevention and treatment

(1) Classical swine fever: pig body temperature rises to 40-42 ℃, lasting; loss of appetite or fasting, mental depression, chills, lying like sleeping, squeezing in a pile or drilling grass nest; standing and walking, arch back bending, limb weakness, slow movement, rocking instability, conjunctival redness, purulent secretions, constipation first, and then diarrhea; ear root, abdomen, the inside of limbs and other places have finger pressure colorfast fuchsia bleeding spots. Lesions: systemic lymph node enlargement, peripheral bleeding, red and white mixed marble; lighter kidney color, needle-sized bleeding spots on the surface; splenomegaly, bleeding, and hemorrhagic infarction protruding from the surface; chronic cases have button ulcers in the ileocecal mucosa of large intestine.

Prevention and control: (1) strengthen daily management and improve environmental hygiene. (2) regular vaccination, in order to eliminate the interference of maternal antibodies, the vaccination dose can be increased (2-4 doses per head). A large dose of classical swine fever vaccine (8-10 doses per head) was used in the epidemic or threatened areas to vaccinate in time. Increasing the dose of vaccine is not only the best way to eliminate maternal antibodies, but also an effective measure for the prevention and treatment of atypical classical swine fever. (3) when swine fever occurs in swine herds, the diseased pigs should be isolated quickly and disinfected with pigs. Antiswine fever serum can be used in the initial stage of the disease, usually injected once a day for 2-3 times in a row.

(2) Swine flu: the incubation period is 2-7 days, the body temperature of the pig suddenly rises to 40-41.5 ℃, up to 42 ℃, fasting or fasting, depression, muscle and joint pain, often lying down, rapid breathing, paroxysmal spastic cough, dry feces, mucous secretions from the eyes and nose.

Prevention and treatment: (1) use antipyretic analgesics when pigs have a fever, intramuscular injection of 30% analgesin nearly 3-5 ml or oral aspirin 2-4 grams. (2) to control secondary infection, intramuscular injection of 2% aminopyrine 10 ml or penicillin 50,000 units / kg body weight.

(3) porcine lung disease: body temperature can rise to 41-42 ℃, dyspnea, gasping for breath, dog sitting, cough, visible mucosal hyperemia, ocular conjunctival inflammation and purulent eye stool. Red spots appear on the neck, abdomen and medial skin of the extremities behind the ear. The mortality rate is about 70%.

Prevention: regular injection of porcine lung disease vaccine, strengthen feeding management, improve the disease resistance of pigs.

The antibiotics with better therapeutic effect were gentamicin, followed by penicillin and ampicillin.

(4) Streptococcus suis disease: suckling pigs are the most serious, mostly septic, with body temperature as high as 41-43 ℃, eye conjunctiva flushing, tears, cough, dyspnea, and purplish red plaques on the body surface. Dyskinesia and inflexible rear drive. Swollen joints, pain and claudication in arthritic pigs; swollen lymph nodes under the forehead, neck, and front of the thigh in pigs with suppurative lymphadenitis.

Prevention: keep the pig house clean and dry, disinfect regularly, treat the disease with penicillin, 50-80,000 units per kilogram of body weight, twice a day for 3 days.

(5) Porcine toxoplasmosis: similar to classical swine fever and influenza, pig body temperature rises to 40-42 ℃, diseased pigs are depressed, loss of appetite, and severe loss of appetite. There are bruising spots on the head, ears and lower limbs, weak hind limbs, walking and shaking, like lying, coughing. In severe cases, the dog sits in a posture. Foaming at the mouth and miscarriage may occur in pregnant sows.

Prevention and treatment: sick pigs with severe symptoms were injected intravenously with sulfa-6-methoxine and sulfadiazine according to 0.07 grams per kilogram body weight and 100-150 milliliters of 10% glucose, usually 2-3 times. In pigs with mild symptoms, sulfa-6-methoxine was injected intramuscularly at a dose of 0.07 grams per kilogram of body weight, doubling for the first time, twice a day for 3-5 days.

(6) Infectious pleuropneumonia: the body temperature of diseased pigs can reach 42 ℃ or higher, with high dyspnea in sitting or recumbent posture, abdominal breathing, cough, bloody red foam from mouth and nose, cyanosis in abdomen and ear tips.

Prevention and treatment: the disease is highly sensitive to penicillin, ampicillin and long-acting oxytetracycline, among which long-acting oxytetracycline is the most sensitive.

(7) pseudorabies: the body temperature of diseased pigs rose to 41-42 ℃, with typical neurological symptoms, dyspnea, occasional vomiting and diarrhea, peritoneal congestion with small bleeding spots, kidney enlargement, scattered bleeding and cyanosis at the tip of the ear.

Prevention: there is no specific drug for the disease, focus on strengthening daily management, do a good job of vaccination.