Abstract
Parrot bornaviruses (PaBVs) are enveloped, non-segmented, negative sense, single-stranded RNA viruses and the causative agents of proventricular dilatation disease (PDD), a lethal disease of captive psittacine birds worldwide. Neurotropism is a remarkable feature of PDD, which is reflected as a lymphoplasmacytic meningoencephalomyelitis and ganglioneuritis, particularly prominent in the e…