| rift valley fever virus | A mosquito-borne species of the phlebovirus genus and member of the sandfly fever group viruses found in eastern, central, and southern africa, producing massive hepatitis, abortion, and death in sheep, goats, cattle, and other animals. It also has caused disease in humans. (12 Dec 1998) |
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| rinderpest virus | A species of morbillivirus causing cattle plague, a disease with high mortality. Sheep, goats, pigs, and other animals of the order artiodactyla can also be infected. (12 Dec 1998) |
| gross virus | A murine leukaemia virus obtained from inbred mice with a high incidence of spontaneous lymphoid leukaemia. Infection is passed by vertical transmission from one generation to another through the ovum. (12 Dec 1998) |
| Gross' virus | A strain of mouse leukaemia virus. Synonym: Gross' leukaemia virus. (05 Mar 2000) |
| peste des petits ruminants virus | A highly contagious systemic disease of sheep and goats in West Africa, caused by a morbillivirus called peste des petits ruminants virus. It is characterised by fever, anorexia, a necrotic stomatitis with gingivitis, diarrhoea and can often cause a severe, often fatal enteritis and pneumonia. (20 Sep 2002) |
| Guama virus | A serologic group of the genus Bunyavirus, composed of 6 species including Catu virus, and the type strain, Guama virus. (05 Mar 2000) |
| Guaroa virus | A virus of the Bunyamwera group of the genus Bunyavirus, and an agent of bunyavirus encephalitis. (05 Mar 2000) |
| RNA tumour virus | The family of retroviruses (Retroviridae) that can cause tumours. They are enveloped by membrane derived from the plasma membrane of the host cell, from which they are released by budding without lysing the cell. Within each virion is a pair of single stranded RNA molecules. Replication involves a DNA intermediate made on an RNA template by the enzyme reverse transcriptase. (18 Nov 1997) |
| RNA virus | A group of virus's in which the core consists of RNA; a major group of animal virus's that includes the families Picornaviridae, Reoviridae, Togaviridae, Flaviviridae, Bunyaviridae, Arenaviridae, Paramyxoviridae, Retroviridae, Coronaviridae, Orthomyxoviridae, and Rhabdoviridae. Synonym: ribovirus. (05 Mar 2000) |
| pharyngoconjunctival fever virus | One of several types of adenoviruses associated with outbreaks of fever and pharyngitis, sometimes with conjunctivitis, especially in service recruits and people in boarding schools. (05 Mar 2000) |
| mice minute virus | The type species of parvovirus prevalent in mouse colonies and found as a contaminant of many transplanted tumours or leukaemias. (12 Dec 1998) |
| ross river virus | A species of alphavirus associated with epidemic exanthema and polyarthritis in Australia. (12 Dec 1998) |
| Rous-associated virus | A leukaemia virus of the leukosis-sarcoma complex which by phenotypic mixing with a defective (noninfectious) strain of Rous sarcoma virus effects production of infectious sarcoma virus with envelope antigenicity of the RAV. (05 Mar 2000) |
| Rous sarcoma virus | <virology> The virus responsible for the classic first cell free transmission of a solid tumour, the chicken sarcoma, first reported by Rous in 1911. An avian C type oncorna virus, original source of the src oncogene. (18 Nov 1997) |
| Rous sarcoma virus protease | <enzyme> Has been sequenced; crystallographic structure has been determined Registry number: EC 3.4.23.- Synonym: protease, rous sarcoma virus, rous sarcoma virus aspartic protease (26 Jun 1999) |