Arterivirus

Arterivirus
Virus classification
Group: Group IV ((+)ssRNA)
Order: Nidovirales
Family: Arteriviridae
Genus: Arterivirus
Type Species

Arterivirus is the only genus of viruses in the family Arteriviridae, which is within the order Nidovirales. Vertebrates serve as natural hosts. There are currently four species in this genus including the type species Equine arteritis virus. Diseases associated with this genus include: EAV: vascular lesions, fever, edema, abortion. PRRSV: abortions and respiratory disease. SHFV: fever, edema, dehydration, hemorragies, death (almost 100%).[1][2]

Taxonomy

Group: ssRNA(+)

[2]

Structure

Viruses in Arterivirus are enveloped, with spherical, Round, and Isometric geometries. The diameter is around 45-60 nm. Genomes are linear and non-segmented, around 12-16kb in length.[1]

Genus Structure Symmetry Capsid Genomic Arrangement Genomic Segmentation
ArterivirusSphericalEnvelopedLinearMonopartite

Life Cycle

Viral replication is cytoplasmic. Entry into the host cell is achieved by attachment to host receptors, which mediates clathrin-mediated endocytosis. Replication follows the positive stranded RNA virus replication model. Positive stranded rna virus transcription is the method of transcription. Translation takes place by leaky scanning, and -1 ribosomal frameshifting. Vertebrates serve as the natural host. Transmission routes are transplancental, contact, urine, semen, air borne particles, and saliva.[1]

Genus Host Details Tissue Tropism Entry Details Release Details Replication Site Assembly Site Transmission
ArterivirusVertebratesLung macrophages; lymph nodesClathrin-mediated endocytosisBuddingCytoplasmCytoplasmGenital secretions; respiratory tract secretions

History

In 1996, the family Arteriviridae was included within the order Nidovirales. Arteriviruses are small, enveloped, animal viruses with an icosahedral core containing a positive-sense RNA genome. The family includes equine arteritis virus (EAV), porcine reproductive and respiratory syndrome virus (PRRSV), lactate dehydrogenase elevating virus (LDV) of mice and simian haemorrhagic fever virus (SHFV). Three of these viruses were first discovered and characterized in the 1950/60s, whereas PRRSV was first isolated in Europe and in North America in the early 1990s. The arteriviruses are highly species specific, but share many biological and molecular properties, including virion morphology, a unique set of structural proteins, genome organization and replication strategy, and the ability to establish prolonged or true persistent infection in their natural hosts. However, the epidemiology and pathogenesis of the infection caused by each virus is distinct, as are the diseases they cause.[3]

Reorganisation

Because of the discovery of additional viruses a reorganisation of this genus has been proposed.[4] These proposals abolish the genus Arterivirus and created the genera Dipartevirus, Equartevirus, Nesartevirus, Rodartevirus and Simartevirus.

See also

References

  1. 1 2 3 "Viral Zone". ExPASy. Retrieved 12 June 2015.
  2. 1 2 ICTV. "Virus Taxonomy: 2014 Release". Retrieved 12 June 2015.
  3. ↑ Balasuriya and Snijder (2008). "Arteriviruses". Animal Viruses: Molecular Biology. Caister Academic Press. ISBN 978-1-904455-22-6.
  4. ↑ Kuhn JH, Lauck M, Bailey AL, Shchetinin AM, Vishnevskaya TV, Bào Y, Ng TF, LeBreton M, Schneider BS, Gillis A, Tamoufe U, Diffo JL, Takuo JM, Kondov NO, Coffey LL, Wolfe ND, Delwart E, Clawson AN, Postnikova E, Bollinger L, Lackemeyer MG, Radoshitzky SR, Palacios G, Wada J, Shevtsova ZV, Jahrling PB, Lapin BA, Deriabin PG, Dunowska M, Alkhovsky SV, Rogers J, Friedrich TC, O'Connor DH, Goldberg TL (2015) Reorganization and expansion of the nidoviral family Arteriviridae. Arch Virol

External links

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