PBFD is a viral disease caused by the Psittacine Circovirus.
It affects most parrot species as well as other birds, including songbirds and pigeons.
Often referred to as a “childhood disease” in birds, PBFD primarily impacts young birds under the age of three.
PBFD is primarily transmitted through ingestion or inhalation.
Infected birds shed highly resilient viral particles into the environment via their feces, feather dust, and saliva.
There is no specific cure for PBFD — only supportive care combined with isolation of the infected bird. In some cases, the bird's immune system may overcome the virus, clear it from the body, and eliminate the risk of further transmission.
PBFD often presents with non-specific symptoms, including anorexia, lethargy, reduced egg-laying, diarrhea, eye discharge,
disordered feathers, and respiratory tract infections.
In its acute form, the disease may affect internal organs such as the liver, spleen, and lungs.
PBFD is not dangerous to humans and poses no zoonotic risk.
The incubation period can range from 3–4 weeks up to several years, depending on the viral load the bird was exposed to, the molting status, and the bird’s overall health condition.
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