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Picornaviridae
Avian Encephalomyelitis
Question | Answer |
---|---|
What is another name for this disease? | Epidemic Tremor |
Who is this disease mostly seen in? Mild encephalomyelitis is seen in... | Chickens between 1-3 weeks of age. Turkey poults, quail, and pheasants |
Is there disease in adult hens? | NO, just a transient drop in egg production |
How is this virus transmitted? | Fecal-oral route. Eggs during a short viremic phase of approimately 1 week. Lateral spread from chick to hatchmates either in the HATCHERY or during BROODING |
After the virus replicates in the GIT and there is a subsequent viremia, what clinical signs are seen? | Reduction in hatchability of fertile eggs, unsteadiness, sitting on hocks, tremors, prostation, blindness, paralysis, coma, and death |
Rocovered birds may show what? | CNS deficiencies and may have to be killed |
The mortality rate may exceed ? in an intial outbreak. | 50% |
What is significant of the pathology of this disease? | NO GROSS LESIONS AT NECROPSY |
What are two control methods? | Depopulation or vaccination |