Cardoreovirus


Cardoreovirus is a genus of double-stranded RNA viruses in the family Sedoreoviridae. Crabs serve as natural hosts. The genus contains two species. Diseases associated with this genus include: trembling disease. The name derives from Latin words "carcinus" which means crab and "doeca" which means twelve in reference to the number genome segments.

Structure

Viruses in the genus Cardoreovirus are non-enveloped. They have an icosahedral 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 the following species, listed by scientific name and followed by the exemplar virus of the species:Cardoreovirus callinectes, Callinectes sapidus reovirus 2Cardoreovirus eriocheiris, Eriocheir sinensis reovirus