Avisivirus

Avisivirus is a genus of viruses in the order Picornavirales, in the family Picornaviridae. Turkey serve as natural hosts. There are three species in this genus.

Taxonomy
The genus contains the following three species:
 * Avisivirus A
 * Avisivirus B
 * Avisivirus C

Structure
Viruses in Avisivirus are non-enveloped, with icosahedral, spherical, and round geometries, and T=pseudo3 symmetry. The diameter is around 30 nm. Genomes are linear and non-segmented, around 7.5kb in length.

Life cycle
Viral replication is cytoplasmic. Entry into the host cell is achieved by attachment of the virus to host receptors, which mediates endocytosis. Replication follows the positive stranded RNA virus replication model. Positive stranded RNA virus transcription is the method of transcription. Translation takes place by ribosomal skipping. The virus exits the host cell by lysis, and viroporins. Turkey serve as the natural host.