encephalomyelitis

acute disseminated encephalomyelitis an acute or subacute encephalomyelitis or myelitis occurring most commonly following an acute viral infection, especially measles, but sometimes occurring without a recognizable antecedent. Clinical manifestations include fever, headache, vomiting, and drowsiness progressing to lethargy and coma; tremor, seizures, and paralysis may also occur. Mortality ranges from 5 to 20 per cent, and many survivors have residual neurologic deficits.

benign myalgic encephalomyelitis chronic fatigue syndrome.

equine encephalomyelitis a type of encephalomyelitis in horses and mules, caused by an alphavirus and spread to humans by mosquitoes; it occurs in summer epizootics in the Western Hemisphere. Three forms are recognized: eastern, western, and Venezuelan. Called also equine encephalitis.

equine encephalomyelitis, eastern a viral disease similar to western equine encephalomyelitis, but occurring in a region extending from New Hampshire to Texas and as far west as Wisconsin, and in Canada, Mexico, the Caribbean, and parts of Central and South America.

equine encephalomyelitis, Venezuelan a viral disease of horses and mules, transmissible to humans; the causative agent was first isolated in Venezuela. The infection in humans resembles influenza, with little or no indication of nervous system involvement.

equine encephalomyelitis, western a viral disease of horses and mules, communicable to humans, occurring chiefly as a meningoencephalitis with little involvement of the medulla oblongata or spinal cord; observed in the United States chiefly west of the Mississippi River.

granulomatous encephalomyelitis a disease marked by granulomas and necrosis of the walls of the cerebral and spinal ventricles.

postinfectious encephalomyelitis (postvaccinal encephalomyelitis) acute disseminated encephalomyelitis.