Sheep Clostridial Disease: Prevention Through Vaccination

Clostridial diseases cause sudden death and acute suffering in sheep. Vaccination is highly effective and represents one of the most cost-efficient welfare interventions in sheep farming.

Key Facts

Clostridial diseases include pulpy kidney, braxy, blackleg, tetanus, and enterotoxaemia
They are caused by Clostridium bacteria that produce powerful toxins causing rapid tissue destruction and death
Deaths are often sudden — animals found dead without prior visible illness
Combined 7-in-1 vaccines protect against multiple clostridial diseases with two annual doses
Unvaccinated lambs are extremely vulnerable during the high-risk periods of rapid growth on lush pasture
UK sheep vaccination rates remain below 100% despite the proven welfare and economic benefits

Welfare Considerations

Clostridial disease causes intense, brief suffering before death in most cases — animals experiencing enterotoxaemia show rapid convulsions, opisthotonos (star-gazing posture), and death within hours. While the suffering may be short-lived, it is acute and severe. More importantly, it is entirely preventable through routine vaccination. The welfare case for universal clostridial vaccination of sheep flocks is overwhelming — the protection cost is minimal, the benefit is near-complete prevention of a painful and fatal group of diseases. Any flock not vaccinating is accepting preventable welfare harm.

What You Can Do

Vaccinate all sheep with a combined clostridial vaccine and maintain annual boosters
Give primary vaccinations to lambs before high-risk periods (turnout to lush pasture, rapid growth phases)
Vaccinate ewes 4-6 weeks before lambing to boost colostral protection for newborn lambs
Work with your vet to ensure your vaccination protocol covers all relevant clostridial diseases in your region