Analysis of Naturally Occurring Avian Bornavirus Infection and Transmission during an Outbreak of Proventricular Dilatation Disease among Captive Psittacine Birds

A proventricular dilatation disease (PDD) outbreak provided the opportunity to investigate the transmissibility of avian Bornavirus (ABV) and its linkage to PDD under natural conditions. Upon exposure to a bird with a fatal case of PDD, 10 birds became symptomatic and died. ABV2 RNA was recovered from available tissues. Further screening revealed that 12/46 exposed birds were ABV2 + . Three chicks boarded at this aviary developed PDD. They...