| encephalitis, epidemic | A viral encephalitis caused by encephalitis viruses, all arboviruses. The severity of the encephalitis depends upon which virus strain causes the infection. The viruses are maintained by inapparent zoonoses in birds and lower vertebrates, and are transmitted to humans via arthropod vectors. (12 Dec 1998) |
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| encephalitis haemorrhagica | Encephalitis of apoplectoid character due to blood extravasation. Synonym: encephalitis haemorrhagica. (05 Mar 2000) |
| encephalitis, japanese | A form of epidemic encephalitis occurring in japan and other pacific islands, china, manchuria, the former ussr, and probably much of the far east. It may occur as a symptomless, subclinical infection, or as an acute meningoencephalomyelitis with cortical damage and cord lesions resembling those of poliomyelitis. (12 Dec 1998) |
| encephalitis japonica | <pathology> An epidemic viral encephalitis that strikes populations in Japan and other East Asian countries, typically in summer months. Symptoms canresemble poliomyelitis, but the disease can also be virtually symptomless. (09 Oct 1997) |
| encephalitis lethargica | A unique encephalitis, presumably viral in origin, which followed the influenza pandemic of 1914-1918. Symptoms included ophthalmoplegia and marked somnolence, and in many survivors, the delayed development of Parkinson's disease; the basis for postencephalitic Parkinsonism. Synonym: encephalitis lethargica, polioencephalitis infectiva. (05 Mar 2000) |
| encephalitis neonatorum | Encephalitis of the newborn, described by R. Virchow as marked by the presence of fat-laden cells in the brain. (05 Mar 2000) |
| encephalitis periaxialis | Rare demyelinating disease characterised by massive destruction of the myelin in the cerebral hemispheres, cavity formation, and glial scarring. Clinical symptoms include bilateral spasticity, cortical blindness, and progressive dementia. Encephalitis periaxialis diffusa (= schilder's disease) should be reserved for instances of myelinoclastic diffuse sclerosis that correspond to the case described by schilder in 1912. Schilder's disease should not be confused with addison-schilder disease (= adrenoleukodystrophy). (12 Dec 1998) |
| encephalitis periaxialis concentrica | Encephalitis that is clinically similar to adrenoleukodystrophy, but pathologically characterised by concentric globes or circles of demyelination of cerebral white matter separated by normal tissue. Synonym: Balo's disease. (05 Mar 2000) |
| encephalitis periaxialis diffusa | Term used to describe at least two separate disorders described by Schilder: 1) Diffuse sclerosis or encephalitis periaxialis diffusa; a nonfamilial disorder affecting primarily children and young adults and characterised by progressive dementia, visual disturbances, deafness, pseudobulbar palsy, and hemiplegia or quadriplegia. Most patients die within a few years of onset; pathologically, there is a large, asymmetrical area of myelin destruction, sometimes involving an entire cerebral hemisphere, and typically with extension across the corpus callosum. 2) The leukodystrophies. Synonym: encephalitis periaxialis diffusa, Flatau-Schilder disease. (05 Mar 2000) |
| encephalitis pyogenica | Encephalitis of bacterial aetiology. Synonym: encephalitis pyogenica, purulent encephalitis, suppurative encephalitis. (05 Mar 2000) |
| encephalitis, st. louis | A form of epidemic encephalitis, clinically similar to western equine encephalitis, occurring in late summer and early fall and transmitted usually by mosquitoes of the genus culex. (12 Dec 1998) |
| encephalitis subcorticalis chronica | One of the causes of multiinfarct dementia, in which there are many infarcts and lacunes in the white matter, with relative sparing of the cortex and basal ganglia. Synonym: Binswanger's encephalopathy, encephalitis subcorticalis chronica, subcortical arteriosclerotic encephalopathy. (05 Mar 2000) |
| encephalitis, tick-borne | A disease caused by tick-borne encephalitis virus, a species of flavivirus, and a member of the subgroup encephalitis viruses, tick-borne. Tick-borne encephalitis appears to be a spectrum of disease caused by two related viruses: the european subtype - central european encephalitis virus and the eastern subtype - russian spring-summer encephalitis virus. (12 Dec 1998) |
| encephalitis, viral | Inflammation of the brain caused by viruses. When this is caused by encephalitis viruses, a group of arboviruses, it is referred to as epidemic encephalitis (encephalitis, epidemic). Other viruses, including some herpes viruses, also cause viral encephalitis. (12 Dec 1998) |
| encephalitis virus | Any one of a variety of virus's that cause encephalitis. (05 Mar 2000) |