Horse Equine Herpesvirus Welfare Management

Equine herpesvirus type 1 causes respiratory disease and neurological myeloencephalopathy, with welfare management requiring isolation, supportive care, and outbreak control.

Key Facts

EHV-1 myeloencephalopathy (EHM) causes ataxia, hindlimb weakness, and bladder dysfunction
Neurological EHV-1 outbreaks have occurred at major competition venues causing fatalities
Vaccination reduces respiratory disease but provides limited protection against neurological form
Affected horses require intensive nursing including urinary catheterisation and assisted standing
Isolation of affected horses and premises closures are necessary to prevent spread

Welfare Considerations

EHV-1 neurological cases are among the most severe welfare emergencies in equine practice. Affected horses experience rapidly progressive loss of coordination, inability to rise, and severe distress from bladder dysfunction. The prognosis for severely affected horses is poor, and the decision about when to euthanise rather than continue intensive nursing requires regular welfare reassessment. Outbreak management that prevents transmission reduces the number of animals experiencing this severe welfare harm.

What You Can Do

Vaccinate horses against EHV according to current BEVA guidelines
Isolate any horse showing respiratory signs at competition venues
Follow BHA and FEI biosecurity protocols at competitive events
Support improved EHV surveillance at equine events
Consult a vet immediately if a horse develops neurological signs at any event