The chicks are white. The peak period of onset was from 7 to 14 days of age. The diseased chicken suffered depression, chills, trembling, hairy pines, fins, appetite and thirst. The most typical symptom is a white paste, such as thick lime milky feces (white fleas), which is solidified into limestone as soon as it is discharged, blocking the anus, and chicks often die in large numbers due to systemic sepsis. Anatomy shows that the yolk is incompletely absorbed and the surface of the liver has white necrotic dots, while the slightly larger diseased young chicks have grayish yellow nodules and gray liver changes.
E. coli disease. A large number of acute deaths occurred within a few days after the chicks emerged from the shell. The chronic person presented with severe diarrhea, and the feces were pale, with convulsions and circling movements before death. The zygomatic examination revealed yolk enlargement, and the necropsy of older chicks showed white liver exudates on the liver and heart. These were all typical symptoms of E. coli.
Infectious bursal disease. Chickens 3 to 6 weeks old were the most susceptible, and the onset of chicken chills, shrinking heads, row of white sticky and watery samples of feces. Necropsy lesions: bleeding in the leg and chest muscles, edema and hemorrhage in the bursa of Fabricius, and a sliver of bleeding at the junction of the stomach and muscle.
Fowl cholera. Occurs often in adult chickens, chickens often have severe diarrhea, gray and white stools. After the anatomy, epicardial and coronal fat-filled bleeding points were seen. There was a small amount of effusion in the pericardium. Many grayish white necrotic spots were scattered on the surface of the liver, and intestinal hemorrhage was significant.
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