Ranikhet (New Castle Disease) It is an acute, highly contagious rapidly spreading respiratory and contagious rapidly spreading respiratory and nervous disease of poultry and other species of bird with high mortality. The mortality in fowls varies from 50 to 100 percent.  This disease is caused by paramyxovirus. Incubation period of Ranikhet/ New castle disease : … Continue reading Ranikhet (New Castle Disease): Its Symptom, Prevention and Control