Diagnosis and comprehensive prevention of swine big neck disease

How to treat big neck disease? Porcine big neck disease usually refers to a type of disease in which the neck of the pig is seriously edematous and the respiratory sensation is the main symptom before death. The following is mainly to study the on-site diagnosis and prevention experience in the northeast and Hebei regions.

猪大脖子病的诊断及综合防治

First, the incidence

The affected pigs were weaned piglets that had just placed the bed, with an average weight of about 15 kg. Two days after the birth of the bed, it began to appear in succession, and the treatment with sulfa drugs and cyan and streptomycin was not effective. At the time of the visit, one pig died; the rest of the pigs had difficulty breathing, gasping for breath, nasal red foamy liquid, depression, unstable walking, refusal to eat, pale skin, individual pig ears dark red, neck ventral Severe edema, bloody class. Clinical examination, the body temperature of sick pigs increased by 40-42 ° C, acute swelling of the throat, high difficulty breathing, individual pigs mouth, eyes, mucous membranes were purple-red, ventral, ear root and inner limbs of the skin visible erythema, refers to The pressure faded and the ankle joints of the hind legs were swollen.

Second, necropsy lesions

Cut the connective tissue of the throat and see the gelatinous substance and the yellowish liquid leaching; there is a reddish foam liquid in the nostrils and oral cavity, there is a bleeding point in the subcutaneous tissue, the whole body lymph nodes are swollen and hemorrhagic, the interstitial edema is formed, and the surface is covered with a layer of serous fiber. Protein exudate; there are jelly-like edema on the outside of the pericardial coronary ganglion, mucosal hemorrhage in the digestive tract, red spots on the abdomen, thoracic and cervical, auricles of the ear and the inner part of the extremities; inflammatory exudate in the thoracic cavity and pericardium build up.

猪大脖子病的诊断及综合防治

Third, diagnosis

1. Take the liver, spleen, lung, pleural fluid or peritoneal fluid and other disease materials to make smear tablets. After staining with alkaline melamine solution, a large number of small bacilli infected with bipolar can be seen. At the same time, combined with clinical symptoms and cross-section A lesion and a laboratory test can be diagnosed as a Pasteurella multocida infection.

2, classification of symptoms: should be differentiated from acute throat anthrax, porcine infectious pleuropneumonia, asthma.

1 acute throat type anthrax: throat type anthrax mainly affects the submandibular, retropharyngeal and anterior cervical lymph nodes, while the lungs have no obvious inflammatory lesions. The throat swelling of the most acute swine plague is a hemorrhagic serous inflammation of the surrounding tissues and subcutaneous tissues of the throat, and the lungs have acute pulmonary edema and other lesions. The smear was stained with alkaline melamine solution and microscopically examined. The anthrax was found to have a large bacillus with a red capsule, and the porcine lung plague showed a small oval bacillus densely stained at both ends.

2 porcine contagious pleuropneumonia: the pathology of infectious pleuropneumonia is limited to the respiratory system, the pneumonia liver metastasis area is purple on one side, and the pneumonia area of ​​swine plague often has red liver and gray liver mixed; smear Staining microscopy revealed different pathogens.

3 Swine asthma: The main symptoms of asthma are asthma, cough, low body temperature, and mild systemic symptoms. The pneumonia lesions were pancreatic or meaty, with obvious boundaries. The lesions on both sides of the lung were symmetric and there was no tendency for suppuration or necrosis.

猪大脖子病的诊断及综合防治

Fourth, comprehensive prevention

1. The sick pigs are kept in isolation, and the dead pigs are deeply buried. The 1:400 times of iodine solution and 1:300 disease quenching dilution are alternately disinfected.

2, sick and dead pigs and their excrement in a timely manner incineration, deep burial and harmless treatment.

3, the whole farm healthy pig emergency vaccination of the Danfei lung vaccine 2 head / head, strengthen disinfection and feeding management.

4, treatment measures in the morning: ceftimef 5mg / kg body weight, ring 瘟 瘟 康 Kang 0.2ml / kg body weight mixed muscle injection; afternoon: fluorocyl gold prescription 0.05ml / kg body weight, anonymous high fever Kang 0.2ml / kg body weight muscle injection. The whole group of drugs: Gaolin 400ppm, flunicon 400ppm, 50% compound Astragalus polysaccharide 500ppm mixed mix, used for 7 to 10 days.

V. Diagnosis and treatment experience

The disease is easy to occur when the piglets are weaned, refueled, and transferred. Pasteurella is often found in the respiratory tract. When the respiratory tract is damaged, the bacteria multiply by chance, resulting in the onset of piglets under stress.

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