| Rs virus | <virology> This RNA virus is a member of the Paramyxoviridae family and is a major pathogen in the upper and lower respiratory tract in both infants and younger children. Respiratory syncytial virus manifestations include bronchiolitis, pneumonia and croup. Acronym: RSV (27 Sep 1997) |
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| Rubarth's disease virus | A virus causing infectious canine hepatitis in dogs. Synonym: fox encephalitis virus, Rubarth's disease virus. (05 Mar 2000) |
| rubella virus | The type (and only) species of rubivirus causing acute infection in humans, primarily children and young adults. Humans are the only natural host. A live, attenuated vaccine is available for prophylaxis. (12 Dec 1998) |
| rubella virus vaccine | A live virus vaccine prepared from duck embryo or human diploid cell culture infected with rubella virus; administered as a single subcutaneous injection. See: measles, mumps, and rubella vaccine. (05 Mar 2000) |
| rubeola virus | <virology> Paramyxovirus that causes the childhood disease measles and is responsible for subacute sclerosing panencephalitis. (18 Nov 1997) |
| milker's nodule virus | A virus in the family Poxviridae. (05 Mar 2000) |
| mink enteritis virus | A parvovirus that causes enteritis of mink. (05 Mar 2000) |
| mm virus | A strain of encephalomyocarditis virus, a species of cardiovirus, causing neurological disease in the mouse. (12 Dec 1998) |
| Mokola virus | A rabies related virus of the genus Lyssavirus, family Rhabdoviridae, first isolated from shrews (Crocidura spp.) in Nigeria, which has caused fatal neurological disease in man and cats in Africa. (05 Mar 2000) |
| pichinde virus | A species of arenavirus, one of the tacaribe complex viruses, causing a fatal infection in the cricetine rodent oryzomys albigularis. Asymptomatic laboratory infection in humans has been reported. (12 Dec 1998) |
| molluscum contagiosum virus | A species of molluscipoxvirus causing skin lesions in humans. It is transmitted by direct contact or from non-living reservoirs (fomites), such as books or clothing. (12 Dec 1998) |
| moloney leukaemia virus | A murine virus arising during the propagation of s37 mouse sarcoma, and causing lymphoid leukaemia in mice. It also infects rats and newborn hamsters and is apparently transmitted vertically to embryos in utero and through mother's milk. (12 Dec 1998) |
| Moloney murine leukaemia virus | <molecular biology, virology> Replication competent retrovirus (Oncovirinae) that causes leukaemia in mice, isolated by Moloney from cell free extracts made from a transplantable mouse sarcoma. (18 Nov 1997) |
| Moloney murine sarcoma virus | <molecular biology, virology> Replication defective retrovirus, source of the oncogene v mos, responsible for inducing fibrosarcomas in vivo and transforming cells in culture. (18 Nov 1997) |
| moloney sarcoma virus | A replication-defective murine sarcoma virus (sarcoma viruses, murine) isolated from a rhabdomyosarcoma by moloney in 1966. (12 Dec 1998) |