''Seadornavirus'' is a genus of

viruses A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Viruses infect all life forms, from animals and plants to microorganisms, including bacteria and archaea. Since Dmitri Ivanovsky's 1 ...

, 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-layere ...

'', in the subfamily '' Sedoreovirinae''. Human, cattle, pig, and mosquitoes serve as natural hosts. There are three species in this genus: ''

Banna virus Banna virus (BAV) is a virus belonging to ''Reoviridae'', a family of segmented, non-enveloped, double-stranded RNA viruses. It is an arbovirus, being primarily transmitted to humans from the bite of infected mosquitoes of the genus ''Culex''. P ...

'' (BAV), '' Kadipiro virus'' and '' Liao ning virus''. Each of these viruses has been isolated from ''

Aedes ''Aedes'' is a genus of mosquitoes originally found in tropical and subtropical zones, but now found on all continents except perhaps Antarctica. Some species have been spread by human activity: ''Aedes albopictus'', a particularly invasive spe ...

'', ''

Anopheles ''Anopheles'' () is a genus of mosquito first described and named by J. W. Meigen in 1818. About 460 species are recognised; while over 100 can transmit human malaria, only 30–40 commonly transmit parasites of the genus ''Plasmodium'', which c ...

'' and ''

Culex ''Culex'' is a genus of mosquitoes, several species of which serve as vectors of one or more important diseases of birds, humans, and other animals. The diseases they vector include arbovirus infections such as West Nile virus, Japanese encep ...

'' mosquito populations, but only BAV has been shown to cause infection in humans, in which the symptoms are similar to

Japanese encephalitis Japanese encephalitis (JE) is an infection of the brain caused by the Japanese encephalitis virus (JEV). While most infections result in little or no symptoms, occasional inflammation of the brain occurs. In these cases, symptoms may include he ...

—

fever Fever, also referred to as pyrexia, is defined as having a body temperature, temperature above the human body temperature, normal range due to an increase in the body's temperature Human body temperature#Fever, set point. There is not a single ...

malaise As a medical term, malaise is a feeling of general discomfort, uneasiness or lack of wellbeing and often the first sign of an infection or other disease. The word has existed in French since at least the 12th century. The term is often used ...

and

encephalitis Encephalitis is inflammation of the brain. The severity can be variable with symptoms including reduction or alteration in consciousness, headache, fever, confusion, a stiff neck, and vomiting. Complications may include seizures, hallucinations, ...

.Attoui H, Mohd Jaafar F, de Lamballerie X, Mertens PPC Seadornavirus, Reoviridae In: Fauquet CM, Mayo MA, Maniloff J, Desselberger U, Ball LA, editors. Virus taxonomy: eighth report of the international committee on taxonomy of viruses. London: Elsevier/Academic Press; 2005. p. 504–10 The word ''seadornavirus'' is an

portmanteau A portmanteau word, or portmanteau (, ) is a blend of wordsBanna virus Banna virus (BAV) is a virus belonging to ''Reoviridae'', a family of segmented, non-enveloped, double-stranded RNA viruses. It is an arbovirus, being primarily transmitted to humans from the bite of infected mosquitoes of the genus ''Culex''. P ...

'' *'' Kadipiro virus'' *'' Liao ning virus''

Structure

Viruses in ''Seadornavirus'' are non-enveloped, with icosahedral geometries, and T=13, T=2 symmetry. The diameter is around 60-70 nm. Genomes are linear and segmented. Segments range in length from 862 to 3747 base pairs, totaling 21 kb in length. The genome codes for 12 proteins.

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. Human, cattle, pig, mosquitoes (arthropod-borne), and mosquitoes serve as the natural host. Transmission routes are zoonosis and bite.

References

External links

Viralzone: Seadornavirus

ICTV

ICTV home page
{{Taxonbar, from=Q16992482 Virus genera Seadornaviruses