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*Porcine circovirus in Postweaning multisystemic wasting syndrome (PMWS) in [[Respiratory Viral Infections - Pathology#Postweaning multisystemic wasting syndrome (PMWS)|respiratory disease]]
=Introduction=
Circoviruses are the smallest known viruses of vertebrates and plants, and cause immunosuppressive infections of pigs, poultry, and parrots. No vaccines are currently available against them.
=Morphology=
*Genome is a single molecule of circular positive-sense DNA, which encodes for one major capsid protein
=Virulence and Pathogenesis=
*Viruses are '''very stable''' in the environment
=Virus by Species=
[[Avian Circoviruses]]
[[Porcine Circoviruses]]