Virus Taxonomy at the XIth International Congress of Virology, Sydney, Australia, 1999
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Virology Division News Arch Virol 144/10 (1999)
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Virology Division News
Virus Taxonomy at the XIth International Congress of Virology, Sydney, Australia, 1999 C. R. Pringle ICTV Secretary, Biological Science Department, University of Warwick, Coventry, U.K.
Introduction The Eleventh International Congress of Virology was held from 9th–13th August at the Convention Cente, Darling Harbour, Sydney, Australia. The Congress included a Workshop on the Taxonomy of Viruses, and was also the occasion of the Eleventh Plenary Meeting of the International Committee on Taxonomy of Viruses (ICTV) and the Twentyeighth Meeting of the Executive Committee of the ICTV. Taxonomic proposals Several taxonomic proposals, that had arrived too late to be incorporated in to the 7th Report of the ICTV, which is now in press, were considered and approved by the Executive Committee at a meeting prior to the Congress. Later in the week all the proposals were ratified at the Plenary Meeting as required by the Statutes of the ICTV. These taxonomic decisions involve plant and vertebrate viruses. There were no taxonomic proposals featuring bacterial or fungal viruses; decisions on several proposals affecting the taxonomy of invertebrate viruses were deferred and referred back to the relevant Study Group for amplification. The new plant virus proposals and decisions are the following: 1.
2.
3.
Downgrading of Petunia flower mottle virus (PetFMV) from independent species to be ranked as a strain of the species Columbian datura virus (CDV), because recent sequence data indicates that these two viruses are very similar. Elevation of Tomato pseudo-curly top virus (TPCV) from its position as a species in the genus Curtovirus to become the type species of a new genus in the family Geminiviridae designated the genus Topocuvirus. Change of the name Barley yellow dwarf satellite RNA to become Cereal yellow dwarf satellite RNA, since the existing name was inaccurate.
The vertebrate virus decisions affect viruses in the families Circoviridae and Picornaviridae. The majority of the proposals affecting the family Picornaviridae had already been ratified by postal ballot of the ICTV voting constituency and appear in both the 7th Report
Virology Division News
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and the synopsis previously published in Virology Division News [2]. These decisions entail the abolition of all existing picornavirus species (serotypes) and their replacement by species consisting of groups of related serotypes (previously referred to as “clusters”). Consequently, the family Picornaviridae now comprises the genera Enterovirus (with eight new species), Rhinovirus (with two species), Cardiovirus (with two species), Aphthovirus (with two species), Hepatovirus (with one species) and Parechovirus (with one species). The following new proposals were approved by the EC to complete the revision of the taxonomic structure of the family Picornaviridae. 1. 2. 3.
4.
To designate provisionally “Avian encephalomyelitis-like virus” as a tentative species in the genus Hepatovirus. To
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