PBFD feathers of a budgerigarPBFD affected red-rumped parrot
Psittacine beak and feather disease (PBFD) is a viral disease affecting all Old World and New World parrots. The causative virus—beak and feather disease virus (BFDV)—belongs to the taxonomic genus Circovirus, family Circoviridae. It attacks the feather follicles and the beak and claw matrices of the bird, causing progressive feather, claw and beak malformation and necrosis. In later stages of the disease, feather shaft constriction occurs, hampering development until eventually all feather growth stops. It occurs in an acutely fatal form and a chronic form.
Cracking and peeling of the outer layers of the claws and beak make tissues vulnerable to secondary infection. Because the virus also affects the thymus and Bursa of Fabricius, slowing lymphocyte production, immunosuppression occurs and the bird becomes more vulnerable to secondary infections. Beak fractures and necrosis of the hard palate can prevent the bird from eating.[1]
^Pyne, M. Psittacine Beak and Feather Disease. Currumbin Wildlife Sanctuary, Gold Coast. National Wildlife Rehabilitation Conference 2005.
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finches is believed to be lower than in psittacine birds. In certain contexts, the word is used when the disease is carried by any species of birds belonging...
characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight...
(Psittaciformes), also known as psittacines (/ˈsɪtəsaɪnz/), are birds with a strong curved beak, upright stance, and clawed feet. They are conformed by...
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Cholesterol Assays in the Investigation of Hepatic Lipidosis and Atherosclerosis in Psittacine Birds" (PDF). ICE2005 PROCEEDINGS. www.exoticdvm.com. Retrieved...
undertail feathers are blue with white fringes. The underparts are red with green flanks. The beak is pale blue-grey with a dark grey cere. The legs and feet...
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