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any member of a genus of RNA viruses, some of which have been found to cause disease in areas of the world such as Central Africa and Siberia. Mosquitoes, ticks, and sandflies are vectors.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.


A genus of viruses of vertebrates (family Reoviridae) that multiply in arthropods, including certain viruses formerly included with the arboviruses. They are antigenically distinct from other groups of viruses and are characterized by an indistinct but rather large outer layer of capsomeres that give the appearance of rings (hence the name). The genus includes, among others, bluetongue virus of sheep and African horse sickness virus.
[L. orbis, ring, + virus]
Farlex Partner Medical Dictionary © Farlex 2012


A genus of viruses of vertebrates that multiply in insects, including human Colorado tick fever virus.
[L. orbis, ring, + virus]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
Toggenburg Orbivirus a new bluetongue virus: initial detection first observations in field and experimental infection of goats and sheep.
It is caused by bluetongue virus (BTV) of genus Orbivirus and family Reoviridae.
Characterization of Minacu virus (Reoviridae: Orbivirus) and pathological changes in experimentally infected newborn mice.
The major arbovirus families are the Togaviridae (the genus Alphavirus), Flaviviridae (the genus Flavivirus), Bunyaviridae (all genera except Hantavirus), and Reoviridae (the genera Coltivirus and Orbivirus).
Austin, TX, March 08, 2014 --(PR.com)-- Bioo Scientific is offering a new set of ELISA tests for the detection of Epizootic Hemorrhagic Disease Virus (EHDV), an orbivirus that infects most wild and domestic ruminants.
The family Reoviridae is divided into nine genera with only four (Orthoreovirus, Coltivirus, Rotavirus, and Orbivirus) infecting humans and animals.