Horse Equine Influenza Biosecurity During Outbreaks

Equine influenza outbreaks spread rapidly through shared equipment and contact. Rigorous biosecurity during outbreak periods contains spread and protects unaffected horses.

Key Facts

Equine influenza can spread over distances of up to 5km in airborne droplets
Shared equipment including tack, grooming kit and water buckets transmits virus effectively
Incubation period of 1-5 days means apparently healthy horses may be shedding before signs appear
Isolation of suspected cases within 2 hours of symptom onset is the most effective outbreak response
HBLB Equine Disease Surveillance coordinates reporting and information sharing during outbreaks

Welfare Considerations

Horses that develop influenza during outbreaks suffer from fever, nasal discharge, coughing and profound fatigue that prevents normal behaviour and requires extended rest. Secondary bacterial pneumonia in horses pushed back into work prematurely causes severe welfare harm. Outbreak biosecurity requires strict application of barriers, cleaning, disinfection and movement restriction that places significant operational demands on yard management. Horses that are effectively protected from outbreak exposure by timely biosecurity measures are spared the welfare impact of disease. Clear yard protocols agreed in advance allow rapid implementation when outbreaks occur.

What You Can Do

Implement immediate isolation of any horse with fever, cough or nasal discharge during outbreaks
Halt all horse movement on and off the yard until the situation is assessed by your vet
Disinfect all shared equipment including water buckets, feed buckets and grooming tools
Report suspected influenza to HBLB Equine Disease Surveillance system
Rest affected horses for at least 1 week per day of fever before gradual return to work