Síndrome da Dilatação do Proventrículo: uma doença emergente com potencial impacto à conservação in situ e ex situ de psitacídeos

Tânia Freitas Raso


Proventricular Dilatation Disease: an emerging disease with potential impact to psittacine conservation in situ and ex situ – Proventricular dilatation disease (PDD) also known as neuropathic gastric dilatation syndrome, Macaw wasting disease or myenteric ganglioneuritis was first recognized in the 1970s in psittacine birds. However, only in 2008 avian bornavirus has been suggested as an etiologic agent. Its incidence has increased significantly in many countries, so it is recognized as an emerging disease. Currently it is considered the main fatal illness in Psittaciformes, however it affects other avian orders with less intensity. This disease affects primarily the nervous and digestory systems leading to several gastrointestinal dysfunctions resulting in clinical signs which include regurgitation, diarrhea and undigested food in their droppings, as well as ataxia, tremors and seizures. In the last years, intensive efforts have been devoted in order to determine precisely its pathogenesis, epidemiology and diagnosis. Nonetheless, the correct diagnosis and control of PDD has been hampered by the difficulty to identify infected, but asymptomatic birds, which shed the virus intermittently. This review also discusses the potential impact of this disease in the captive populations of psittacines birds in Brazil and the conservation programs in situ and ex situ of endangered species.


Bornavirus; conservation; Proventricular Dilatation Disease; Psittacine birds

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