Avian Polyomavirus Study Guide
Overview and Clinical Importance
Avian polyomavirus (APV), also historically known as Budgerigar Fledgling Disease Virus (BFDV), is one of the most significant viral pathogens affecting captive psittacine birds worldwide. First characterized in young budgerigars in 1981 in Ontario, Canada and the southern United States, APV is now recognized as a major threat to aviaries, pet stores, and breeding facilities, causing substantial economic losses.
APV belongs to the family Polyomaviridae, genus Gammapolyomavirus. It is a non-enveloped, icosahedral virus with a circular double-stranded DNA genome of approximately 5,000 base pairs. The virus is highly stable in the environment and resistant to many common disinfectants, making aviary control challenging.
Understanding APV is essential for the NAVLE because it represents a high-yield topic in avian medicine with characteristic clinical presentations, distinctive pathology, and important management considerations for preventing outbreaks in breeding facilities.
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