Avian Psittacine Beak and Feather Disease Study Guide
Overview and Clinical Importance
Psittacine Beak and Feather Disease (PBFD) is the most significant viral disease affecting psittacine birds worldwide. Caused by the Beak and Feather Disease Virus (BFDV), a member of the family Circoviridae, this disease results in progressive feather dystrophy, beak and claw abnormalities, and immunosuppression. PBFD was first described in Australian cockatoos in the 1970s and has since been identified in over 78 psittacine species globally.
The disease is highly contagious and environmentally stable, making prevention and biosecurity critical. BFDV is considered the dominant viral pathogen of psittacine birds in Australasia and poses a significant conservation threat to endangered species such as the orange-bellied parrot (Neophema chrysogaster).
Etiology
Causative Agent
PBFD is caused by Beak and Feather Disease Virus (BFDV), previously known as Psittacine Circovirus (PsCV). Key viral characteristics include:
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