International Committee on Taxonomy of Viruses (ICTV)

ICTV Elections

This fall, the ICTV will elect members of the Executive Committee. The positions available are those of President, Vice-President, Data Secretary, Proposals Secretary, and eleven Elected Members. The process is described in section 4.3 of the ICTV Statutes. If you wish to recommend someone for nomination, please send an email with the necessary documentation (see section 4.3.1) to nominations@ictv.global by 3 August 2020.

Naming the 2019 Coronavirus

The International Committee on Taxonomy of Viruses (ICTV) is concerned with the designation and naming of virus taxa (i.e. species, genus, family, etc.) rather than the designation of virus common names or disease names. For an outbreak of a new viral disease, there are three names to be decided: the disease, the virus and the species. The World Health Organization (WHO) is responsible for the first, expert virologists for the second, the ICTV for the third.

WHO guidelines for naming of new human diseases can be found at "WHO issues best practices for naming new human infectious diseases" and "WHO Best Practices for the Naming of New Human Infectious Diseases" The following article may also be of interest:
"Naming diseases: First do no harm"

As experts on coronaviruses, the ICTV Coronaviridae Study Group has studied the classification (taxonomy) of the new virus. And given that they are experts on this family of viruses, they have also contributed their expertise to the naming of the virus. The virus name is "severe acute respiratory syndrome coronavirus 2" (SARS-CoV-2). And the species to which the virus SARS-CoV-2 belongs is Severe acute respiratory syndrome-related coronavirus.

The disease name (which in many cases is different from the virus name) has been designated as COVID-19 by the WHO. The '19' in COVID-19 stands for the year, 2019, that the virus was first seen. The number '19' has nothing whatsoever to do with virus strains, genotypes, or anything else related to the virus' genetics. The virus name was announced by the World Health Organization on February 11, 2020. See the February 11 World Health Organization Situation Report. This clearly states that "WHO has named the disease COVID-19, short for 'coronavirus disease 2019'.”

Virus taxonomy finds its roots

For some time, the classification of viruses by virus taxonomists has been focused on the grouping of relatively closely related viruses, often in the context of a paradigm that emphasizes the rapid evolution of viruses that cause disease in man, crops and animals. However, more recently, shotgun metagenomic sequencing has revealed the presence of a vast variety of viruses in environmental samples and apparently healthy organisms from all divisions of life. As a result of these advances, the International Committee on Taxonomy of Viruses (ICTV) has come to recognize that virus taxonomy can now be usefully extended to include the basal evolutionary relationships among distantly related viruses. Consequently, the ICTV has changed its Code to allow a fifteen-rank classification hierarchy that closely aligns with the Linnaean taxonomic system. This new structure can accommodate the entire spectrum of genetic divergence in the virosphere. We also predict that this new rank hierarchy will stimulate further research on virus origins and evolution and help to align virus taxonomy with the taxonomies of cellular organisms. This change has been recently reported in Nature Microbiology article (Nature Microbiology 5, 668–674 (2020)

ICTV Taxonomy Release #35: 2019

The new 2019 ICTV taxonomy is now available online at https://ictv.global/taxonomy, and the new Master Species List #35 is available for download as an Excel Spreadsheet.

This new release contains taxonomic changes approved by the ICTV membership in March, 2020. This release contains 4 realms, 9 kingdoms, 16 phyla, 2 subphyla, 36 classes, 55 orders, 8 suborders, 168 families, 103 subfamilies, 1421 genera, 68 subgenera, and 6590 species.

A paper describing this release is being prepared for publication in the Virology Division News section of Archives of Virology.

Submit Your Taxonomy Proposal for 2020

New taxonomy proposals for 2020 can now be submitted. Templates for submitting proposals are available from https://ictv.global/proposal_templates/. These 2020 templates MUST be used for all submissions. Please download all four files and read the Help file for detailed information on the submission process.

The deadline for proposal submission to Subcommittee Chairs is July 31, 2020.

Navigating Menus

• Information: Members, FAQs, Code and Statutes, History, News, Newsletters, VDN articles.
• Taxonomy: Current and historical ICTV taxonomic databases
• Files: Taxonomy Proposals, Master Species Lists, Proposal templates, and other ICTV-related files.
• Discussions: Discussions about the ICTV and virus taxonomy.
• Study Groups: Information on virus families provided by ICTV Study Groups.
• Meetings: Reports from ICTV-sponsored meetings addressing current problems in virus taxonomy.
• ICTV Reports: The ICTV Report on Virus Classification and Taxon Nomenclature

ICTV Taxonomy Release #35: 2019

The new 2019 ICTV taxonomy is now available online at https://ictv.global/taxonomy. The new Master Species List #35 is available for download as an Excel Spreadsheet.

This new release contains taxonomic changes approved by the ICTV membership in March, 2020. A paper describing this release is being prepared for publication in the Virology Division News section of Archives of Virology.

Official taxonomy proposals documenting all of the taxonomic changes approved by the ICTV since the publication of the ICTV 8th Report can be found at https://ictv.global/Official_ICTV_Proposals.htm.

The Virus Metadata Resource

The Virus Metadata Resource (VMR) is a downloadable spreadsheet that provides information on exemplar viruses for each species. This information includes GenBank and RefSeq accession numbers for exemplar viruses and isolate and common names for viruses belonging to a species. The most recent VMR release adds information on the known categories of hosts infected by the virus or the source environment from which the virus was isolated. New VMR Release posted May 1, 2020.

Submitting Taxonomic Proposals

The ICTV Report on Virus Classification and Taxon Nomenclature

Journal of General Virology: ICTV Virus Taxonomy Profiles

How to write virus and species names

Why virus taxonomy is important

The article, "Why virus taxonomy is important", published in Microbiology Today by Stuart Siddell, ICTV Vice President, discusses the importance of virus taxonomy and its role in helping to define the evolutionary relationships between viruses and understand the consequences of virus diversity.

ICTV in Nucleic Acids Research

An article appearing in the Nucleic Acids Research 2018 Database issue, "Virus taxonomy: the database of the International Committee on Taxonomy of Viruses (ICTV)" describes the ICTV database and the web-based tools available to query that database: Lefkowitz EJ, Dempsey DM, Hendrickson RC, Orton RJ, Siddell SG, Smith DB. Nucleic Acids Res. 2017 Oct 13. doi: 10.1093/nar/gkx932. PubMed PMID: 29040670.