''Cardoreovirus'' is a genus of

double-stranded RNA viruses Double-stranded RNA viruses (dsRNA viruses) are a polyphyletic group of viruses that have double-stranded genomes made of ribonucleic acid. The double-stranded genome is used to transcribe a positive-strand RNA by the viral RNA-dependent RNA pol ...

in the family ''

Reoviridae ''Reoviridae'' is a family of double-stranded RNA viruses. Member viruses have a wide host range, including vertebrates, invertebrates, plants, protists and fungi. They lack lipid envelopes and package their segmented genome within multi-layered ...

'' and subfamily ''

Sedoreovirinae ''Sedoreovirinae'' (''sedo'' = smooth) is a subfamily of the ''Reoviridae'' family of viruses. Viruses in this subfamily are distinguished by the absence of a turreted protein on the inner capsid to produce a smooth surface. Characteristics Like ...

''. Crabs serve as natural hosts. There is only one species in this genus: ''Eriocheir sinensis reovirus''. Diseases associated with this genus include: trembling disease. The name derives from Latin words "''car''cinus" which means crab and "''do''eca" which means twelve in reference to the number genome segments.

Structure

Viruses in the genus ''Cardoreovirus'' are non-enveloped. They have an

icosahedral In geometry, an icosahedron ( or ) is a polyhedron with 20 faces. The name comes and . The plural can be either "icosahedra" () or "icosahedrons". There are infinitely many non- similar shapes of icosahedra, some of them being more symmetrica ...

capsid that is three-layered. The inner shell has T=2 symmetry and the middle shell has T=13 symmetry. The diameter is around 55 nm.

Genome

The genome is made of double-stranded RNA. It is linear and has twelve segments.

Life cycle

Viral replication is cytoplasmic. Entry into the host cell is achieved by attachment to host receptors, which mediates endocytosis. Replication follows the double-stranded RNA virus replication model. Double-stranded RNA virus transcription is the method of transcription. The virus exits the host cell by monopartite non-tubule guided viral movement. Crabs serve as the natural host. Transmission routes are passive diffusion.

Taxonomy

The genus contains one species: *''Eriocheir sinensis reovirus''

References

External links

Viralzone: Cardoreovirus

ICTV
{{Taxonbar, from=Q18822262 Reoviruses Virus genera