Horses

Horse Equine Influenza Outbreak Biosecurity

Equine influenza spreads rapidly between horses causing significant respiratory disease. Vaccination and strict biosecurity during outbreaks protect horse health and welfare.

Key Facts

Equine influenza is caused by influenza A viruses transmitted through respiratory secretions and aerosols
The virus spreads rapidly at competitions, sales and racing yards affecting large numbers quickly
Unvaccinated horses develop fever, cough, nasal discharge and severe lethargy
Vaccination provides good protection but requires boosters every 6-12 months to maintain immunity
Major outbreaks have halted racing seasons and caused significant economic and welfare impacts

Welfare Considerations

Horses with influenza suffer respiratory distress, high fevers and profound fatigue. Complications including secondary bacterial pneumonia can be life-threatening. Continuing to exercise horses during active infection dramatically worsens outcomes and prolongs recovery. Vaccination is the most effective welfare intervention, reducing both disease severity and spread.

What You Can Do

Vaccinate horses against equine influenza according to current regulatory and vaccination schedules
Isolate any horse with fever or respiratory signs immediately and contact a vet
Implement biosecurity when returning horses from competitions or sales including 2-week isolation
Report suspected equine influenza outbreaks to animal health authorities promptly
Rest horses fully for at least one week after clinical recovery to prevent complications