| Bornholm disease virus | A virus of Enterovirus coxsackievirus type B, in the family Picornaviridae, that causes epidemic pleurodynia. Synonym: Bornholm disease virus, epidemic myalgia virus. (05 Mar 2000) |
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| bovine ephemeral fever virus | A rhabdovirus causing bovine ephemeral fever in cattle. (05 Mar 2000) |
| bovine immunodeficiency virus | A lentivirus causing lymphocytosis in cattle. (05 Mar 2000) |
| bovine leukaemia virus | A type C retrovirus in the subfamily Retrovirinae, commonly infecting cattle, especially dairy cows; in a small proportion of infected cattle, it will cause enzootic bovine leukosis. Synonym: bovine leukosis virus. (05 Mar 2000) |
| bovine leukosis virus | A type C retrovirus in the subfamily Retrovirinae, commonly infecting cattle, especially dairy cows; in a small proportion of infected cattle, it will cause enzootic bovine leukosis. Synonym: bovine leukosis virus. (05 Mar 2000) |
| bovine papular stomatitis virus | A poxvirus of the genus Parapoxvirus, reported from North America, Africa and Europe, causing bovine papular stomatitis. Synonym: papular stomatitis virus of cattle. (05 Mar 2000) |
| bovine respiratory syncytial virus | A pneumovirus causing an emerging disease in young cattle characterised by pneumonia, interstitial pulmonary oedema, and emphysema; sheep are also susceptible to the virus. (05 Mar 2000) |
| bovine virus diarrhoea | A specific infectious disease of cattle, caused by a togavirus; characterised by ulceration of the mouth, pharynx, oesophagus, and sometimes the stomachs and intestines; may or may not be accompanied by severe diarrhoea. Synonym: mucosal disease. (05 Mar 2000) |
| bovine virus diarrhoea-mucosal disease | Acute disease of cattle caused by the bovine viral diarrhoea virus (diarrhoea virus, bovine viral). Often mouth ulcerations are the only sign but fever, diarrhoea, drop in milk yield, and loss of appetite are also seen. Mortality is high in animals showing clinical signs, especially diarrhoea. (12 Dec 1998) |
| Bunyamwera virus | A serologic group of the genus Bunyavirus, composed of over 150 virus types in the family Bunyaviridae. Origin: Bunyamwera, Uganda, where first isolated (05 Mar 2000) |
| B virus | A herpesvirus, in the family Herpesviridae, affecting Old World monkeys, that is very similar morphologically to herpes simplex virus; fatal infection may occur in humans following the bite of an infected monkey, although other modes of transmission have also been documented. Synonym: monkey B virus. (05 Mar 2000) |
| Bwamba virus | A genus of viruses in the family Bunyaviridae; a serologic group of the genus Bunyavirus; associated with cases of Bwamba fever in Uganda. Origin: Bwamba, forest in Uganda where first isolated (05 Mar 2000) |
| California virus | A serologic group of the genus Bunyavirus, comprising over 14 strains including La Crosse and Tahyna virus, and the type strain, California virus, which causes encephalitis, chiefly in the age group 4 to 14 years. (05 Mar 2000) |
| camelpox virus | An orthopoxvirus causing camelpox in camels. (05 Mar 2000) |
| canarypox virus | A poxvirus of the genus Avipoxvirus causing a fatal disease of canaries, and also infecting sparrows. (05 Mar 2000) |