Hepeviridae

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Hepeviridae
Hepatitis E virus.jpg
TEM micrograph of hepatitis E virions.
Virus classification
Group: Group IV ((+)ssRNA)
Family: Hepeviridae
Genera

Hepeviridae is a family of viruses. Human, pig, wild boar, monkey, some rodents, and chicken serve as natural hosts. There are five species in this family, divided between two genera. Diseases associated with this family include: hepatitis; high mortality rate during pregnancy; and avian hepatitis E virus is the cause of hepatitis-splenomegaly (HS) syndrome among chickens.[1][2]Orthohepevirus used to be known as Hepevirus. The virus that causes Hepatitis E belongs to the Orthohepevirus genus.

Taxonomy[edit]

Group: ssRNA(+)

[2]

Structure[edit]

Viruses in Hepeviridae are non-enveloped, with icosahedral and spherical geometries, and T=1 symmetry. The diameter is around 32-34 nm. Genomes are linear and non-segmented, around 7.2kb in length. The genome has three open reading frames.[1]

Genus Structure Symmetry Capsid Genomic Arrangement Genomic Segmentation
Orthohepevirus icosahedral, spherical T=1 Non-enveloped Linear Monopartite
Piscihepevirus icosahedral, spherical T=1 Non-enveloped Linear Monopartite

Life cycle[edit]

Entry into the host cell is achieved by attachment of the virus 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. Human, pig, wild boar, monkey, some rodents, and chicken serve as the natural host. Transmission routes are zoonosis and fomite.[1]

Genus Host Details Tissue Tropism Entry Details Release Details Replication Site Assembly Site Transmission
Orthohepevirus Human, pig, wild boar, monkey, some rodents, chicken Attachment Intestine, hepatocytes Cytoplasm Cytoplasm zoonosis, fomite
Piscihepevirus Human, pig, wild boar, monkey, some rodents, chicken Attachment Intestine, hepatocytes Cytoplasm Cytoplasm zoonosis, fomite

References[edit]

  1. ^ a b c "Viral Zone". ExPASy. Retrieved 15 June 2015. 
  2. ^ a b ICTV. "Virus Taxonomy: 2014 Release". Retrieved 15 June 2015. 

External Links[edit]