| polyomavirus encephalopathy in a ducorps' cockatoo (cacatua ducorpsii) with psittacine beak and feather disease. | necropsy tissues were examined from an adult wild-caught ducorps' cockatoo (cacatua ducorpsii) with progressive neurologic signs. of the tissue specimens selected for histologic evaluation, only the brain contained rare amphophilic, glassy intranuclear inclusions within astrocytes and some neurons. astrocyte and neuronal degeneration and necrosis also were observed. scattered astrocytes, with and without discernable inclusions, contained avian polyomavirus (apv) nucleic acid, as determined by dn ... | 1996 | 8844570 |