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Baltimore Classification

Higher order taxa

Viruses; ssDNA viruses; Circoviridae; Circovirus


Beak and feather disease virus, Canary circovirus, Goose circovirus

Description and Significance

Circoviruses are very small non-enveloped icosahedral viruses with a single stranded circular DNA genome. They have been described in pigs (porcine circovirus, PCV), chickens (chicken anemia virua, ChAV), psittacines (psittacine beak and feather disease virus, PBFD) and pigeons.

Genome Structure

The genome of the circovirus is monomeric. It is unsegmented and contains a single molecule of circular, ambisense, sinle-stranded DNA that forms a covalently closed circle. The complete genome is 1800-2000 nucleotides long and the genome has a guanine+cytosine content of 48.4-53.1 %. (source: ICTV dB Descriptions)

Virion Structure of a (virus name here)

Reproduction Cycle of a (virus name here) in a Host Cell

Viral Ecology & Pathology