A field strain of avian encephalomyelitis virus, neutralized by hyperimmune serum produced against the Van Roekel strain, was introduced per os into susceptible 1-day-old chicks. Clinical signs were ...

As part of a larger ecologic research project and to collect disease prevalence information on backyard chicken flocks in northwestern Ecuador, 100 randomly selected birds from 10 flocks were examined ...

A VIRUS has been isolated from the brains of chickens which have died or been killed while suffering from a disease indistinguishable by clinical signs or histopathological lesions from infectious ...