| experimental induction of proventricular dilatation disease in cockatiels (nymphicus hollandicus) inoculated with brain homogenates containing avian bornavirus 4. | proventricular dilatation disease (pdd) is a fatal disorder of psittacine birds worldwide. the disease is characterized by lymphoplasmacytic infiltration of the central and peripheral nervous systems, leading to gastrointestinal motility and/or central nervous system dysfunction. recently, we detected a significant association between avian bornavirus (abv) infection and clinical signs of pdd in psittacines. however, it remains unclear whether abv infection actually causes pdd. to address this q ... | 2009 | 19589169 |