High fever in pigs should be timely diagnosis and treatment

In the clinical diagnosis and treatment of swine diseases, some of them have been diagnosed because of the unclear diagnosis of swine fever and even caused the pigs to die, causing great economic losses to farmers. There are many diseases that lead to high fever in pigs. This often brings with it difficult difficulties in differential diagnosis. Therefore, timely and accurate diagnosis and treatment are required.

High fever caused by swine fever

The disease can occur throughout the year. In recent years, due to the long-term use of swine fever vaccine, the pig body has a certain degree of disease resistance, a few due to leakage, immunization methods are incorrect, and the amount of vaccine used is insufficient, resulting in atypical swine fever. The incubation period is about 7 days, the shortest 2 days and the longest 21 days. The common acute swine fever generally rises to 40.5°C~42.5°C, and is subject to missed heat. Before death, the body temperature rapidly drops below room temperature. Spiritually healed, chills arched, loss of appetite or wasted, walking slowly, rough coat, two eyes without God; early fecal dry small balls, late diarrhea, some alternating with diarrhea, often with mucus in the feces or Blood; spotting or patchy bleeding of the skin on the abdomen, vulva, medial limbs, ears, lower jaw, etc. Anatomical examination: There are purple spots on the skin of the chest, abdomen, and extremities; there are large spots of bleeding or bleeding spots in the lungs, stomach, kidney, gallbladder, heart, liver, and spleen; the spleen edge is often of different sizes Bleeding infarct.

Prevention and control measures: Choose high-efficiency and low-toxic disinfectants, and regularly carry out barrowing and environmental disinfection, which are important measures to kill pathogenic microorganisms, cut off the transmission route, and ensure the safe production of live pigs; regularly sampling antibody concentrations of immunized pigs from immunized pigs Whether to achieve the protection level, resolutely eliminate some pigs whose immunity level is still low or the pathogen serum test positive pigs, and purify the breeding herds; formulating a personalized scientific immunization program and strictly implementing it are the key measures for effective control of swine fever.

Reference immunization procedures are as follows: For rural free-range or medium and small-scale pig farms, the first immunization is performed at 21 days to 25 days of the pigs, subcutaneous or intramuscular injection of swine fever vaccine, 2 heads per head; 60 days old to 65 days old, Two immunizations, 4 pigs per pig. Pigs are inoculated 2 times to 3 times a year, with 4 heads per head. Sows are injected after weaning.

Exterminated pig farms or small and medium-sized pig farms: The pigs were pre-immunized, that is, the pigs were given subcutaneous or intramuscular injection of a swine fever vaccine 1 dose before sucking colostrum, and were fed again every 2 hours or so; Two immunizations, 4 pigs per pig. Breeding immunization ibid.

High fever caused by blue ear disease in pigs

The pigs of all breeds and ages of this disease can be infected. Both high temperature and low temperature can cause the disease to occur, spread rapidly, and have a high incidence rate. In infected pig farms, the rate of miscarriage, premature delivery and stillbirth of sows is more than 20%. The mortality rate of newborn pigs and pre-weaned pigs is as high as 80%. The fattening pigs have a high incidence and a low mortality rate. This disease generally has a latency period of 2 days to 37 days and is characterized by increased sow body temperature, anorexia, miscarriage, stillbirth, mummy, and weak larvae, as well as respiratory symptoms and high mortality. The temperature of nursery and fattening pigs increased by 40°C~41°C. They were depressed, anorexia, and coma. The number of breathing was increased, coughing, and some pig ears and abdomen were blue. Anatomical examination: There were no characteristic eye changes in the fetus and neonates; abortions and preterm birth were weak; some had brown skin, pale yellow effusions in the abdominal cavity and pericardial cavity, and some had sub-sequential edema of the fetus. Porcine pigs, bred pigs, and finishing pigs had edema of the eyelids, enlarged lymph nodes, and pericardial effusion.

Treatments: Vaccine immunization is currently the most effective measure to control highly pathogenic blue ear disease. Recently, the Ministry of Agriculture approved that the strain of Jiangxi type (NVDV-JXAl) has a higher safety and better immune effect against the highly pathogenic blue-ear disease of pigs. It is the current prevention and control of highly pathogenic blue pigs. The ear disease is the best choice.

Recommended mandatory immunization procedures: For commercial pigs, the first-in-a-day (SD1) strain of the blue-ear disease virus inactivated vaccine (2 ml) and the 50-day-old Erwin Jiangxi type (NVDV-JXAl) strain vaccine (2 ml) were removed for the first time at 21 days; Two immunizations were performed respectively 2 months and 1 month before breeding. 4 ml of inactivated vaccine against Shandong ear (SD1) strain of PRRSV was injected; female sows were vaccinated and immunized once before mating, and Shandong type (SD1) was injected. ) 4 ml of inactivated vaccine against strains of blue ear disease; 4 kinds of boars were immunized every 6 months and 4 ml of inactivated vaccine of Shandong-type (SD1) strain of PRRSV was injected.

High fever caused by swine contagious pleuropneumonia

The pathogen of the disease is Haemophilus parahaemolyticus. Pigs of all breeds and ages can be infected. The incidence and mortality of suckling pigs are 100%, the incidence of brooding pigs is 5% to 10%, and the mortality rate is 0.5% to 25%. It can occur throughout the year and occurs frequently in winter and spring. It is mainly transmitted through the respiratory tract and often distributed. Sudden onset of sick pigs, increased body temperature above 40°C, loss of appetite, difficulty in breathing, standing or sitting in a dog, mouth stretching, abdominal breathing, if treatment is not timely, often within 1 to 2 days death. Anatomical examination: acute pneumonia is mostly bilateral, and the lungs are purple. Those who died within 1 day had pale bloody exudates in the chest. For those who died more than one day, there was cellulite attached to the surface of the pneumonia area and there was yellow exudate.

Control measures: Once clinical symptoms are found in the pigs, they should be immediately removed and isolated. Early treatment of the disease with antibacterial drugs is effective, the preferred drug is penicillin, followed by chloramphenicol, synergistic methyl isoxazole and tetracycline, can be based on the characteristics of the drug used for multiple injections, or fed through the feed, the same effect.

1. With compound sulfamonomethoxine (first 20 ml, second 1.0 ml) and intramuscular injection of dexamethasone 10 ml twice a day for 2 days, the affected pig can recover.

2. The original net of the branch was 20 mg to 30 mg per kilogram of body weight and used in conjunction for 5 days; oxytetracycline was added at 600 g per ton of feed and used for 5 days to 7 days.

3. Use traditional Chinese medicine, 10 grams of licorice, 10 grams of gardenia, 10 grams of medicine bamboo leaf, 15 grams of silver flower, 15 grams of forsythia, 10 grams of mint, 10 grams of burdock root, 25 grams of reed rhizome, 8 grams of radix astragali, gypsum 20 Grams, pollen 8 grams, 12 grams of light bean pods, 10 grams of Nepeta, formulated as "Yinqiao San", waiting for warm water, to prevent the incidence of pigs.

4. In order to prevent the introduction of infected pigs, pigs immunized from the 2-month to 3-month-old pigs with the same serotype before the pigs were given good preventive effects.

High fever caused by swine with red body disease

The pathogen of this disease is pig eperythrozoon. Mosquito, flies, cockroaches, fleas, and fleas are the transmission media of the disease and are frequently distributed in summer and are mostly distributed. Pigs, cattle, sheep and other mammals can be infected. The incubation period of the disease is about 7 days, and the body temperature rises to 40°C~41.7°C. The body is depressed, the appetite is abolished, the visible mucous membranes are stained yellow, the breath is short, the heart is hyperthyroid, and the hematuria. Anatomical examination: The main changes were anemia and jaundice, pale skin and mucous membranes, thin blood, and enlarged liver and spleen. A blood smear can be taken at the tip of the ear upon diagnosis and microscopic examination after Giemsa's staining. Eperythrocytosis can be confirmed.

Treatment: Optional. (1) Blood worm net (or triazepam, benier) 5 mg to 10 mg per kilogram body weight, dilute to 5% solution with normal saline, intramuscular injection at one point, once daily for 3 days. (2) imidazole phenylurea with 1 mg to 3 mg per kilogram of body weight, once a day, once every 2 days to 3 days. (3) Oxytetracycline, chlortetracycline 10 mg per kilogram body weight, chlortetracycline 15 mg per kilogram body weight, oral or intramuscular or intravenous injection, continuous use 7 days to 14 days. (4) The new arsenic vanadine intravenous injection of 10 mg to 15 mg per kilogram of body weight, the symptoms can generally disappear after 3 days. At the same time the above formula can be based on the actual situation, with the appropriate vitamin B1, vitamin B12, vitamin C and other drugs for treatment, the better. (4) According to the daily amount of 50 kg body weight prescription, Astragalus 45 grams, 35 grams of licorice, 150 grams of Glauber's salt, 50 grams of rhubarb, 65 grams of gentian, Banlangen 110 grams, 40 grams of angelica, 30 grams of Bupleurum, suffering After gavage. Once a day, use 3 days to 5 days.