NATURAL AND EXPERIMENTAL-INFECTION OF TURKEYS WITH AVIAN PARAMYXOVIRUS-7

Avian paramyxovirus-7 was isolated from a natural outbreak of respirat ory tract disease in male and female commercial turkey breeder flocks. The disease spread readily between different housing complexes. The v irus was isolated from affected flocks and used for experimental studi es in specific-pathogen-free poults. Inoculated and contact-exposed po ults developed a respiratory disease characterized by rhinitis and air sacculitis. The virus was isolated from the inoculated and contact-exp osed poults, and hemagglutination inhibition antibodies were detected in exposed birds.