Anatomical analysis of unknown high fever in pigs

There are obvious edema, pulmonary edema and severe pulmonary consolidation in lymph nodes of the whole body; There are red and purple lesions in the whole lung, especially in the heart lobe, mesenchymal lobe and diaphragm lobe. In addition, dead pigs also found hyperplasia, congestion and bleeding in the larynx and trachea, and the trachea was full of mucus and foam. There are bleeding spots on the surface of tubular fat, endocardium, epicardium and kidney. The kidneys are swollen and brown or yellow.

On the other hand, the cortex and medulla of the kidney are bleeding, while the renal pelvis and renal papilla are also bleeding. Pigs with "high fever" show very different pathological changes due to mixed infection and secondary infection. In this case, lung lesions are manifested as suppuration, bleeding point, respiratory disorder or hemorrhagic pneumonia, interstitial pneumonia and fibrous pneumonia. Some also have pericarditis and peritonitis. Some pigs also show some digestive tract diseases, such as mucosal bleeding, edema, ulceration, etc., and some pigs show liver diseases, such as cirrhosis, yellow liver, brittle liver texture, liver necrosis or white spots, enlarged gallbladder and sticky bile.