Emergence of Parrot Bornavirus 4 (PaBV-4) in India: Implications for Avian Health

The recent identification of Parrot bornavirus 4 (PaBV-4) in India marks a significant development in the field of veterinary science and wildlife health. PaBV-4 is a viral pathogen known to cause Proventricular Dilatation Disease (PDD) in psittacine birds—a group that includes parrots, macaws, and parakeets. The virus primarily affects the nervous system and the gastrointestinal tract, often leading to severe emaciation and mortality in infected birds. This discovery is particularly concerning for India’s biodiversity and captive bird management. While the virus has been documented globally, its emergence in India highlights the risks associated with the illegal wildlife trade, the lack of stringent quarantine protocols for exotic species, and the potential for cross-species transmission. In captive settings, where birds are often kept in close proximity, the virus can spread rapidly, posing a threat to both private collections and zoological parks. Furthermore, the potential for this virus to spill over into native avian populations remains a critical area of concern for wildlife biologists and conservationists.