Farmed Cattle: Respiratory Syncytial Virus and Calf Welfare

Bovine respiratory syncytial virus is a major cause of respiratory disease in young calves, causing significant welfare suffering that is preventable through vaccination and management.

Key Facts

BRSV causes severe respiratory illness in calves under 6 months, particularly in autumn and winter
Clinical signs include fever, laboured breathing, coughing, and nasal discharge
BRSV infection can cause permanent lung damage even in calves that survive
Mixing calves of different ages increases BRSV transmission and disease severity
Intranasal vaccines provide rapid protection and can be used from 1 day of age
Colostrum quality and adequate intake are critical determinants of early calf BRSV susceptibility

Welfare Considerations

BRSV causes intense respiratory suffering in young calves - fever, laboured breathing, and systemic illness that can persist for weeks. The respiratory distress of severe BRSV is acutely uncomfortable and the long-term lung scarring from severe infection creates lasting welfare impairment. Prevention through vaccination and management to limit between-age-group transmission is highly effective and economically justified. The welfare case for proactive vaccination programmes is strong - preventing BRSV prevents weeks of suffering and potential permanent respiratory disability in calves that would otherwise be affected.

What You Can Do

Support mandatory vaccination programmes for BRSV in commercial calf-rearing operations
Choose dairy and beef products from farms demonstrating comprehensive respiratory disease prevention
Advocate for colostrum management standards ensuring adequate early calf immunity
Support veterinary-led herd health programmes that include BRSV prevention protocols
Donate to veterinary welfare charities supporting disease prevention in smallholder cattle operations