virus taxonomy
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2021 ◽  
Vol 102 (12) ◽  
Author(s):  
Merike Sõmera ◽  
Denis Fargette ◽  
Eugénie Hébrard ◽  
Cecilia Sarmiento ◽  

The family Solemoviridae includes viruses with icosahedral particles (26–34 nm in diameter) assembled on T=3 symmetry with a 4–6 kb positive-sense, monopartite, polycistronic RNA genome. Transmission of members of the genera Sobemovirus and Polemovirus occurs via mechanical wounding, vegetative propagation, insect vectors or abiotically through soil; members of the genera Polerovirus and Enamovirus are transmitted by specific aphids. Most solemoviruses have a narrow host range. This is a summary of the International Committee on Taxonomy of Viruses (ICTV) Report on the family Solemoviridae, which is available at ictv.global/report/solemoviridae.


2021 ◽  
Vol 102 (12) ◽  
Author(s):  
John Coffin ◽  
Jonas Blomberg ◽  
Hung Fan ◽  
Robert Gifford ◽  
Theodora Hatziioannou ◽  
...  

Viruses in the family Retroviridae are found in a wide variety of vertebrate hosts. Enveloped virions are 80–100 nm in diameter with an inner core containing the viral genome and replicative enzymes. Core morphology is often characteristic for viruses within the same genus. Replication involves reverse transcription and integration into host cell DNA, resulting in a provirus. Integration into germline cells can result in a heritable provirus known as an endogenous retrovirus. This is a summary of the International Committee on Taxonomy of Viruses (ICTV) Report on the family Retroviridae, which is available at ictv.global/report/retroviridae.


2021 ◽  
Vol 102 (12) ◽  
Author(s):  
Elvira Fiallo-Olivé ◽  
Jean-Michel Lett ◽  
Darren P. Martin ◽  
Philippe Roumagnac ◽  
Arvind Varsani ◽  
...  

The family Geminiviridae includes viruses with mono- or bipartite single-stranded, circular DNA genomes of 2.5–5.2 kb. They cause economically important diseases in most tropical and subtropical regions of the world. Geminiviruses infect dicot and monocot plants and are transmitted by insect vectors. DNA satellites are associated with some geminiviruses. This is a summary of the International Committee on Taxonomy of Viruses (ICTV) Report on the family Geminiviridae which is available at ictv.global/report/geminiviridae.


2021 ◽  
Vol 102 (11) ◽  
Author(s):  
Beatriz Soriano ◽  
Mart Krupovic ◽  
Carlos Llorens

The family Belpaoviridae comprises metazoan-infecting reverse-transcribing viruses with long terminal repeats, commonly known as Bel/Pao LTR retrotransposons. These viruses share evolutionary history and genes involved in genome replication and virion formation with reverse-transcribing viruses of the families Metaviridae, Pseudoviridae, Retroviridae and Caulimoviridae. These five families form the order Ortervirales. This is a summary of the ICTV Report on the family Belpaoviridae, which is available at ictv.global/report/belpaoviridae.


2021 ◽  
Vol 102 (11) ◽  
Author(s):  
Ralf G. Dietzgen ◽  
Andrew E. Firth ◽  
Dàohóng Jiāng ◽  
Sandra Junglen ◽  
Hideki Kondo ◽  
...  

Nyamiviridae is a family of viruses in the order Mononegavirales, with unsegmented (except for members of the genus Tapwovirus), negative-sense RNA genomes of 10–13 kb. Nyamviruses have a genome organisation and content similar to that of other mononegaviruses. Nyamiviridae includes several genera that form monophyletic clades on phylogenetic analysis of the RNA polymerase. Nyamiviruses have been found associated with diverse invertebrates as well as land- and seabirds. Members of the genera Nyavirus and Socyvirus produce enveloped, spherical virions. This is a summary of the International Committee on Taxonomy of Viruses (ICTV) Report on the family Nyamiviridae, which is available at ictv.global/report/nyamiviridae.


2021 ◽  
Vol 102 (10) ◽  
Author(s):  
Derek Gatherer ◽  
Daniel P. Depledge ◽  
Carol A. Hartley ◽  
Moriah L. Szpara ◽  
Paola K. Vaz ◽  
...  

Members of the family Herpesviridae have enveloped, spherical virions with characteristic complex structures consisting of symmetrical and non-symmetrical components. The linear, double-stranded DNA genomes of 125–241 kbp contain 70–170 genes, of which 43 have been inherited from an ancestral herpesvirus. In general, herpesviruses have coevolved with and are highly adapted to their hosts, which comprise many mammalian, avian and reptilian species. Following primary infection, they are able to establish lifelong latent infection, during which there is limited viral gene expression. Severe disease is usually observed only in the foetus, the very young, the immunocompromised or following infection of an alternative host. This is a summary of the International Committee on Taxonomy of Viruses (ICTV) Report on the family Herpesviridae, which is available at ictv.global/report/herpesviridae.


2021 ◽  
Vol 102 (8) ◽  
Author(s):  
Andrew S. Lang ◽  
Marli Vlok ◽  
Alexander I. Culley ◽  
Curtis A. Suttle ◽  
Yoshitake Takao ◽  
...  

The family Marnaviridae comprises small non-enveloped viruses with positive-sense RNA genomes of 8.6–9.6 kb. Isolates infect marine single-celled eukaryotes (protists) that come from diverse lineages. Some members are known from metagenomic studies of ocean virioplankton, with additional unclassified viruses described from metagenomic datasets derived from marine and freshwater environments. This is a summary of the International Committee on Taxonomy of Viruses (ICTV) Report on the family Marnaviridae, which is available at ictv.global/report/marnaviridae.


2021 ◽  
Vol 102 (8) ◽  
Author(s):  
Margo A. Brinton ◽  
Anastasia A. Gulyaeva ◽  
Udeni B. R. Balasuriya ◽  
Magda Dunowska ◽  
Kay S. Faaberg ◽  
...  

The family Arteriviridae comprises enveloped RNA viruses with a linear, positive-sense genome of approximately 12.7 to 15.7 kb. The spherical, pleomorphic virions have a median diameter of 50–74 nm and include eight to eleven viral proteins. Arteriviruses infect non-human mammals in a vector-independent manner. Infections are often persistent and can either be asymptomatic or produce overt disease. Some arteriviruses are important veterinary pathogens while others infect particular species of wild rodents or African non-human primates. This is a summary of the International Committee on Taxonomy of Viruses (ICTV) Report on the family Arteriviridae, which is available at ictv.global/report/arteriviridae.


2021 ◽  
Vol 102 (7) ◽  
Author(s):  
Jong-Geol Kim ◽  
Khaled S. Gazi ◽  
Mart Krupovic ◽  
Sung-Keun Rhee ◽  

Members of the family Thaspiviridae have linear dsDNA genomes of 27 to 29 kbp and are the first viruses known to infect mesophilic ammonia-oxidizing archaea of the phylum Thaumarchaeota. The spindle-shaped virions of Nitrosopumilus spindle-shaped virus 1 possess short tails at one pole and measure 64±3 nm in diameter and 112±6 nm in length. This morphology is similar to that of members of the families Fuselloviridae and Halspiviridae. Virus replication is not lytic but leads to growth inhibition of the host. This is a summary of the International Committee on Taxonomy of Viruses (ICTV) Report on the family Thaspiviridae, which is available at ictv.global/report/thaspiviridae.


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