Equine Encephalitis Virus

Antigenicity

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

Diseases

Equine viral encephalitides

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

VEE in Donkeys