Implicit Attributes

Unless indicated otherwise, the following attributes are implicit throughout the descriptions, except where the characters concerned are inapplicable.

Name, Synonyms and Lineage

The taxon has the accepted ICTV name. Virus is not assigned to an order.

Virion Properties

Introduction

Symptoms in the host are well established and the causative agent is determined. Distinct viral structures are visible in thin sections of infected tissue. Particles contain nucleic acid. Nucleic acid of virions is encapsidated.

Morphology

And consist of a capsid. During their life cycle, virions have an extracellular phase; occur in one phenotype only and are encapsidated during extracellular phase. The infection is initiated by extracellular virions. Virus capsid (core) is   by a single layer envelope. Have no protrusions. The envelope surrounds one nucleocapsid and has surface projections. Host ribosomes are not seen inside the envelope. Virions are not tailed. A regular capsid structure is present. The capsid shells of virions are composed of a single layer. The capsid surface structure is maintained using conventional electron microscopy.

Virion populations are comprised of particles of uniform size. Capsids all have the same appearance and only one species is recovered in preparations.

Nucleic Acid

The genome is monomeric. Minor species of non–genomic nucleic acid are not found in virions. Is genomic . Is genomic . Double-stranded DNA has free 5' and 3' termini. The 5'–terminus has no poly (C) tract. Each virion contains a single copy of the genome.

Structural Proteins: During post-translational processing envelope protein has not been cleaved. During post-translational processing envelope protein has not been cleaved. During post-translational processing envelope protein has not been cleaved. During post-translational processing envelope protein has not been cleaved. Surface membrane protein has not been cleaved. Surface membrane protein has not been cleaved. Surface membrane protein has not been cleaved. Surface membrane protein has not been cleaved. Capsid protein has not been cleaved. Capsid protein has not been cleaved. Capsid protein has not been cleaved. Spike protein has not been cleaved. Inner capsid protein has not been cleaved. Inner capsid protein has not been cleaved. Nucleocapsid protein has not been cleaved. Nucleocapsid protein has not been cleaved. Nucleocapsid protein has not been cleaved. Nucleocapsid protein has not been cleaved. Tail protein has not been cleaved. Tail protein has not been cleaved. Fiber protein has not been cleaved. Core protein has not been cleaved. Core protein has not been cleaved. Core protein has not been cleaved. Core protein has not been cleaved. Matrix protein has not been cleaved. Matrix protein has not been cleaved. Tegument protein has not been cleaved. Tegument protein has not been cleaved. Lateral body protein has not been cleaved. Lateral body protein has not been cleaved.

Lipids

The composition of viral lipids is known. Lipids are not essential for infectivity.

Polyamines

Polyamines associated with the virion are not present.

Coding Strategy of Segment 1: Sequence has no gene blocks.

Translation: Replication does not involve a reverse transcription step.

Virions are not dependent on a helper virus for replication.

Release: The outer envelope acquired by budding.

Antigenicity

The virus is immunogenic.

Severity and Occurrence of Disease

Host 1: Infection is apparent.

Transmission and Vector Relationships

Virus is not transmitted by a vector.

Contributor

Virus.

Virus-like structures or vesicles visible.

DELTA - DEscription Language for TAxonomy developed by Dr Mike Dallwitz, Toni Paine and Eric Zurcher, CSIRO Entomology, Canberra, Australia. ICTVdB - The Universal Virus Database, developed for the International Committee on Taxonomy of Viruses by Dr Cornelia Büchen-Osmond is written in DELTA. The virus descriptions in ICTVdB are coded by, or using data from experts in the field of virology or members ICTV. The character list is the underlying code. All virus descriptions are based on the character list and natural language translations are automatically generated and formatted for display on the Web from the descriptions in DELTA-format. The description has been generated automatically from DELTA files. DELTA - DEscription Language for TAxonomy developed by Dr Mike Dallwitz, Toni Paine and Eric Zurcher, CSIRO Entomology, Canberra, Australia.

ICTVdB - The Universal Virus Database, developed for the International Committee on Taxonomy of Viruses (ICTV) by Dr Cornelia Büchen-Osmond, is written in DELTA. The virus descriptions in ICTVdB are coded by ICTV members and experts, or by the ICTVdB Management using data provided by the experts, the literature or the latest ICTV Report. The character list is the underlying code. All virus descriptions are based on the character list and natural language translations from the encoded descriptions are automatically generated and formatted for display on the Web.

Developer of the DELTA software: M. J. Dallwitz, T. Paine and E. Zurcher

ICTVdB and DELTA related References

Last updated:18 May 2004 by Cornelia Büchen-Osmond
Web Page generated from ICTVdB by the DELTA systems.

Copyright © 2002    International Committee on Taxonomy of Viruses.    All rights reserved.