Medical terminology · Neurology

Encephalomyelitis, Eastern Equine

MeSH — National Library of Medicine · Retrieved 2026-10-13

A form of arboviral encephalitis (primarily affecting equines) endemic to eastern regions of North America. The causative organism (ENCEPHALOMYELITIS VIRUS, EASTERN EQUINE) may be transmitted to humans via the bite of AEDES mosquitoes. Clinical manifestations include the acute onset of fever, HEADACHE, altered mentation, and SEIZURES followed by coma. The condition is fatal in up to 50% of cases. Recovery may be marked by residual neurologic defi

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Reference details

MeSH descriptor
D020242
Vocabulary edition
2026
Tree positions
C01.207.245.340.450.200; C01.207.291.323.162; C01.207.399.750.450.200; C01.920.313.078.370.162; C01.920.313.156.655.177; C01.920.852.032.370.162; C01.920.852.500.655.177; C01.925.081.343.655.177; C01.925.782.930.100.370.162; C10.228.140.430.520.750.450.200; C10.228.228.245.340.450.200; C10.228.228.291.323.162; C10.228.228.399.750.450.200; C10.586.250.520.750.450.200; C10.586.500.406.200

Scope and definition

A form of arboviral encephalitis (primarily affecting equines) endemic to eastern regions of North America. The causative organism (ENCEPHALOMYELITIS VIRUS, EASTERN EQUINE) may be transmitted to humans via the bite of AEDES mosquitoes. Clinical manifestations include the acute onset of fever, HEADACHE, altered mentation, and SEIZURES followed by coma. The condition is fatal in up to 50% of cases. Recovery may be marked by residual neurologic deficits and EPILEPSY. (From Joynt, Clinical Neurology, 1996, Ch26, pp9-10)

Entry terms and synonyms

Encephalomyelitis, Eastern Equine Eastern Equine Encephalomyelitides Encephalomyelitides, Eastern Equine Equine Encephalomyelitides, Eastern Equine Encephalomyelitis, Eastern Eastern Equine Encephalomyelitis Virus Infection Eastern Equine Encephalomyelitis Eastern Equine Encephalitis Eastern Equine Encephalitides Encephalitides, Eastern Equine Encephalitis, Eastern Equine Equine Encephalitides, Eastern Equine Encephalitis, Eastern

Classification tree positions

C01.207.245.340.450.200 C01.207.291.323.162 C01.207.399.750.450.200 C01.920.313.078.370.162 C01.920.313.156.655.177 C01.920.852.032.370.162 C01.920.852.500.655.177 C01.925.081.343.655.177 C01.925.782.930.100.370.162 C10.228.140.430.520.750.450.200 C10.228.228.245.340.450.200 C10.228.228.291.323.162 C10.228.228.399.750.450.200 C10.586.250.520.750.450.200 C10.586.500.406.200

Sources and reuse

Medical vocabulary definition and classification record.
Retrieved: 2026-10-13. Text has been organized for reading; this import has not been independently reviewed by a clinician. It is not individualized medical advice.
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