Equine Encephalitis Virus

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VIRUSES
TOGAVIRIDAE



Antigenicity

  • 3 Serotypes identified:
    • Eastern EEV
    • Western EEV
    • Venezuelan EEV

Pathogenesis

  • Viremia
  • CNS replication within a week, causing:
    • Paralysis of the lips
    • Drooping eyelids
    • Incoordination
  • Often fatal

Epidemiology

  • Transfer via vector: mostly through mosquito salivary transfer

Diagnosis

  • Clinical signs
  • Virus isolation can be performed from blood or spinal fluid

Control

  • Annual vaccination
  • Vector control
  • Human vaccination recommended for vets in endemic areas