Classification
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| Baltimore group
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Group IV – Positive sense RNA viruses
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| Order
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Nidovirales
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| Family
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Coronaviridae
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| Genus
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coronavirus
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| Species
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Avian infectious bronchitis virus (IBV)
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The surface projections are distinctive club-shaped peplomers that evenly cover the surface. They are densely dispersed. Capsid/nucleocapsid is elongated and exhibits helical symmetry.
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The nucleocapsid is cylindrical; 2 nm in diameter. The genome is not segmented and consists of a single molecule of linear positive-sense single-stranded RNA.
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The viral genome encodes structural proteins and non-structural proteins.
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Characters of the order Nidovirales: Virions have a complex construction and consist of an envelope and a nucleocapsid. Virions are enveloped; spherical, or kidney-shaped, or pleomorphic.
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Last modified: Thursday, 30 September 2010, 4:57 AM
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