Abstract: Vaccine compositions which are protective against circovirus infections, including porcine circovirus and psittacine beak and feather disease virus, in animals, comprising a nucleic acid vector comprising a eukaryotic cis-acting transcription/translation regulatory sequence functionally linked to a nucleic acid encoding an animal circovirus polypeptide, wherein the nucleic acid lacks a viral origin of replication are disclosed. Nucleic acid vectors for the transient expression of one or more circovirus polypeptides in a eukaryotic cell comprising a nucleic acid vector comprising a eukaryotic cis-acting transcription/translation regulatory sequence functionally linked to the nucleic acids of the invention are described.

Abstract: The present invention provides a vaccine which is protective against avian polyomavirus infection in a bird which is classified as being a member of the Psittaciformes order which comprises an immunogenic amount of an inactivated avian polyomavirus in a pharmaceutically acceptable carrier. Also provided is a vaccine which is protective against avian polyomavirus infection in a bird which is classified as being a member of the Psittaciformes order, comprising an immunogenic amount of a recombinant protein derived from an avian polyomavirus and a pharmaceutically acceptable carrier. Also provided is an adjuvant suitable for use in a bird which is classified as being a member of the Psittaciformes order. Further provided is a composition which produces an anamnestic response against avian polyomavirus infection in a sensitized bird which is classified as being a member of the Psittaciformes order, which comprises an anamnestic response inducing amount of a recombinant protein (e.g.

Abstract: The present invention provides a vaccine which is protective against avian polyomavirus infection in a bird which is classified as being a member of the Psittaciformes order which comprises an immunogenic amount of an inactivated avian polyomavirus in a pharmaceutically acceptable carrier. Also provided is an adjuvant suitable for use in a bird which is classified as being a member of the Psittaciformes order. Further provided is a composition which produces an anamnestic response against avian polyomavirus infection in a sensitized bird which is classified as being a member of the Psittaciformes order, which comprises an anamnestic response inducing amount of a recombinant protein (e.g., VP1 capsid protein) of avian polyomavirus in a pharmaceutically acceptable carrier.