a genus of the family circoviridae that infects fowl, swine, and psittacine birds. It is the only dna virus affecting mammals which contains a single-stranded circular genome. The three species are chicken anaemia virus causing transient anaemia and immunosuppression in baby chicks; beak and feather disease virus causing a fatal disease in psittacine birds; and porcine circovirus, not yet associated with any disease.
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... then recombined with a vertebrate-infecting virus. 1999 There are several similarities between the small, circular, single-stranded-DNA genomes of circoviruses that infect vertebrates and the nanoviruses that infect plants. We analyzed circovirus and nanovirus replication initiator protein (Rep) ...
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