<virology> Class IV viruses with a single positive strand RNA genome. Bullet shaped capsid, enveloped by a membrane formed from the host cell plasma membrane, the budded membrane contains host lipids and viral (spike) glycoproteins. The group can be divided into two main groups: alphaviruses, that include Semliki Forest virus and Sindbis virus and flaviviruses, that include yellow fever virus and rubella (German measles) virus. Many are transmitted by insects and were previously classified as arboviruses.

This entry appears with permission from the Dictionary of Cell and Molecular Biology

(11 Mar 2008)

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