The Big Picture Book of Viruses: Reoviridae



Taxonomy: Taxonomic structure of the family. Species: Orthoreovirus; Orbivirus; Rotavirus; Coltivirus; Aquareovirus; Cypovirus; Fijivirus; Phytoreovirus; Oryzavirus. Limited serological relationships have been found among strains of viruses from humans: little or no serological relationships have been detected among viruses from other species.

Host: Virus infects invertebrates, plants, and vertebrates.

Genome: RNA. Double stranded. Linear. Genome monomeric. Genome in six parts. In 10-12 segments (depending on genus); total genome 18200-30500 nucleotides long. 5' terminus has a methylated nucleotide cap (on the positive strand of each duplex, the negative strands have a phosphorylated terminus). Cap sequence m7G5ppp5'GmpNp (type A). 3' terminus has no poly (A) tract. Encapsidated nucleic acid solely genomic. Genome found in one type of particle only. Each virion contains a single copy of genome; full length copy.

Morphology: Virions not occluded, or occluded by protein bodies or crystals in thin sections (sometimes); not enveloped. Virions one type of particle only. Capsids isometric. Capsid shell of virion composed of two layers, or three layers; shell of virion all usually present, or outer often lost. Nucleocapsids with obvious regular surface structure; 60-80 nm in diameter. Symmetry icosahedral. Nucleocapsids appear to be round. Surface capsomer arrangement obvious. Surface projections of nucleocapsid not seen (surface apparently smooth), or not present, or distinct; spikes; restricted to (the 12 vertices). Incomplete virus particles often present; are empty capsids, or are incompletely assembled capsids. Virions only of one kind.

(Note: for more information about the taxonomy and structure of this virus, see the ICTV database below.)

More Information:
Taxonomy: ICTV Data
WWW Sites: ATV Sites!
Tutorials: Tutorial

Reoviridae Images:
Genus Sub-Genus EM Images Example Virus Name Description of Image
Orthoreovirus
Mammalian orthoreoviruses
N/A
reovirus 3 (strain Dearing)
vsd2a
an animal reovirus From Stewart McNulty at Veterinary Sciences, Queen's University, Belfast.
smallvirion
Mammalian reovirus virion solved by cryo-electron microscopy and image reconstruction from the Institute for Molecular Virology - Wisconsin.
smallisvp
Mammalian reovirus ISVP solved by cryo-electron microscopy and image reconstruction from the Institute for Molecular Virology - Wisconsin.
smallcore
Mammalian reovirus core solved by cryo-electron microscopy and image reconstruction from the Institute for Molecular Virology - Wisconsin.
Avian orthoreoviruses
N/A
Orbivirus
African horse sickness group
N/A
African horse sickness viruses 1
Bluetongue virus group
N/A
Bluetongue viruses 1
Changuinola virus group
N/A
Corriparta virus group
N/A
Epizootic hemarrhogic disease virus group
N/A
Epizootic hemarrhogic disease virus 1
Equine encephalosis virus group
N/A
Eubenangee virus group
N/A
Lebombo virus group
N/A
Orungo virus group
N/A
Palyam virus group
N/A
Umatilla virus group
N/A
Wallal virus group
N/A
Warrego virus group
N/A
Kemerovo virus group
N/A
Rotavirus
Group A rotaviruses
N/A
Simian rotavirus SA11
rotavirus particles Note the wheel-like appearance of some of the rotavirus particles. The observance of such particles gave the virus its name ('rota' being the Latin word meaning wheel). Bar = 100 nanometers. Source: Cell culture. Method: Negative-stain Transmission Electron Microscopy
By F.P. Williams, U.S. Environmental Protection Agency.
vsd6a
animal rotavirus From Stewart McNulty at Veterinary Sciences, Queen's University, Belfast.
em_rota
rotavirus an example virus image from the ICTV
grady3
rotavirus Two transmission electron micrographs illustrating the appearance of negatively stained rotavirus as seen in a stool sample. From the Wadsworth Center of the New York State Department of Health.
rota-sm
human rotavirus (from Linda Stannard, of the Department of Medical Microbiology, University of Cape Town)
newrota2
human rotavirus inner capsid in a drawing is shown side-by-side with a colourised EM image; (from Linda Stannard, of the Department of Medical Microbiology, University of Cape Town)
rotaboth
human rotavirus a double-capsid particle is shown on the left, and the single (inner) capsid on its right; (from Linda Stannard, of the Department of Medical Microbiology, University of Cape Town)
rotaenv4
human rotavirus The outer capsid is positioned upon the virion in such a way that the capsomeres of each capsid layer co-incide. (from Linda Stannard, of the Department of Medical Microbiology, University of Cape Town)
Group B rotaviruses
N/A
Group C rotaviruses
N/A
porcine Cowden strain
Group D rotaviruses
N/A
Group E rotaviruses
N/A
Coltivirus
N/A
Colorado tick fever virus
Aquareovirus
Group A aquareoviruses
N/A
Simian rotavirus SA11
Group B aquareoviruses
N/A
Group C aquareoviruses
N/A
Golden shiner virus
Group D aquareoviruses
N/A
Group E aquareoviruses
N/A
Cypovirus
Cypovirus type 1
N/A
Bombyx mori cypovirus 1
Cypovirus type 2
N/A
Cypovirus type 3
N/A
Cypovirus type 4
N/A
Cypovirus type 5
N/A
Cypovirus type 6
N/A
Cypovirus type 7
N/A
Cypovirus type 8
N/A
Cypovirus type 9
N/A
Cypovirus type 10
N/A
Cypovirus type 11
N/A
Cypovirus type 12
N/A
Fijivirus
Fijivirus group 1
N/A
Fiji disease virus
Fijivirus group 2
N/A
Fijivirus group 3
N/A
Phytoreovirus
N/A
Wound tumor virus
Oryzavirus
N/A
Rice ragged stunt


Viral Diseases - Virus Names - Virus Families - Virus Hosts - Viruses By Genome Type

Big Picture Book of Viruses - FAQ - Submit a Site - All the Virology on the WWW


© 1995-2007. D. Sander Established 5/95.