| blue disease | <infectious disease> An acute febrile (feverish) disease initially recognised in the Rocky Mountain states, caused by Rickettsia rickettsii transmitted by hard-shelled (ixodid) ticks. Occurs only in the Western Hemisphere. The disease is characterised by sudden onset of headache, chills and fever which can persist for 2-3 weeks, muscle pain. A characteristic rash appears on the extremities and trunk about the 4th day of illness. The rickettsiae grow within damaged cells lining blood vessels which may become blocked by clots. Blood vessel inflammation (vasculitis) is widespread Early recognition of the condition and prompt antibiotic treatment is important in reducing mortality. Synonym: spotted fever, tick fever, and tick typhus. (25 Jun 1999) |
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| Boeck's disease | <disease> Disease of unknown aetiology in which there are chronic inflammatory granulomatous lesions in lymph nodes and other organs. (18 Nov 1997) |
| border disease | Congenital disorder of lambs caused by a virus closely related to or identical with certain strains of bovine viral diarrhoea virus. (12 Dec 1998) |
| border disease virus | A species of pestivirus causing a congenital sheep disease characterised by an abnormally hairy birth-coat, tremors, and poor growth. (12 Dec 1998) |
| borna disease | An encephalomyelitis of horses, sheep and cattle caused by an RNA virus. (12 Dec 1998) |
| borna disease virus | An unclassified, single-stranded RNA virus, possibly related to the family rhabdoviridae, causing a rare and usually fatal encephalitic disease in horses and other domestic animals and possibly deer. Its name derives from the city in saxony where the condition was first described in 1894, but the disease occurs in europe, n. Africa, and the near east. (12 Dec 1998) |
| Bornholm disease | An alternative term for epidemic pleurodynia. Origin: Bornholm, Danish island in the Baltic where the d. Was first described (05 Mar 2000) |
| 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) |
| Bosin's disease | <neurology> Chronic progressive illness seen in children a few years after measles infection and involving demyelination of the cerebral cortex. Virus apparently persists in brain cells: usually considered a slow virus disease. (18 Nov 1997) |
| Bouchard's disease | Myopathic dilation of the stomach. (05 Mar 2000) |
| Bouillaud's disease | An obsolete eponym for acute rheumatic fever with carditis. (05 Mar 2000) |
| Bourneville-Pringle disease | Facial lesions with tuberous sclerosis, first reported as adenoma sebaceum, but now recognised as angiofibromas. (05 Mar 2000) |
| Bourneville's disease | <radiology> (Bourneville disease) autosomal dominant phakomatosis classic triad: seizures, retardation, adenoma sebaceum, calcified subependymal hamartomas, uncalcified tubers in cerebral cortex, enhancing lesion most likely to be malignant transformation to giant cell astrocytoma associated with: skin lesions, angiomyolipoma, increased risk of renal cell carcinoma (12 Dec 1998) |
| 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) |
| bowen's disease | A persistent progressive non-elevated red scaly or crusted plaque which is due to an intradermal carcinoma and is potentially malignant. Atypical squamous cells proliferate through the whole thickness of the epidermis. The lesions may occur anywhere on the skin surface or on mucosal surfaces. The cause most frequently found is trivalent arsenic compounds. Freezing, cauterization or diathermy coagulation is often effective. (12 Dec 1998) |