Duck Paramyxovirus Disease (duck-origin Newcastle disease) is an acute septic infectious disease that caused by duck paramyxovirus (duck-origin Newcastle disease virus). The disease is mainly characterized by diarrhea, neurological symptoms, focal glandular gastric bleeding or ulcers, intestinal mucosal bleeding and necrosis of the pancreas or the spleen.Ducks are usually infected concentrated at 5 to 8 weeks of age. And the rates of morbidity and mortality are separately up to 20% to 60% and 10% to...
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