First Detection of Psittacid Alphaherpesvirus 5 and Coinfection with Beak and Feather Disease Virus in Naturally Infected Captive Ringneck Parakeets ( Psittacula Krameri ) in Brazil

This study describes a case report in captive rose-ringed parakeets ( Psittacula krameri ) that developed clinical signs and eventually died after introducing new birds without quarantine. Bronchopneumonia and airsacculitis with syncytial cells associated with intranuclear inclusion bodies were found. Herpesvirus was detected in lungs and liver by PCR, and a nearly complete genome sequence of a Psittacid alphaherpesvirus 5 was obtained from the lung of a bird. Metagenomic analysis also identified beak and feather disease virus in the same samples. The study also highlights the importance of quarantine for avoiding the introduction of new diseases in captive aviaries.