Farm Animal Welfare

Farm Cattle: Liver Fluke Monitoring and Control

Liver fluke is one of the most economically and welfare-significant parasitic diseases of UK cattle, requiring strategic monitoring and targeted treatment.

Key Facts

Fasciola hepatica infects cattle through ingestion of encysted metacercariae on pasture
Acute fluke causes sudden death in heavily infected animals; chronic fluke causes progressive wasting
The mud snail intermediate host requires wet areas for breeding, making fluke risk weather-dependent
Triclabendazole treats acute immature fluke but resistance is emerging in some flocks
Faecal egg count and bulk tank milk ELISA testing allow strategic treatment decisions

Welfare Considerations

Chronic liver fluke causes progressive welfare deterioration through liver damage, malnutrition, and susceptibility to secondary infections. Acutely infected animals may die within days of apparent health. Strategic monitoring using diagnostic testing enables targeted treatment of infected animals rather than blanket treatment, reducing antiparasitic drug use while maintaining welfare protection.

What You Can Do

Test cattle for liver fluke using faecal or blood testing before treating
Work with your vet to create a liver fluke control plan based on local risk
Fence wet areas to prevent cattle grazing in high-risk snail habitat
Monitor treatment efficacy through post-treatment testing
Record fluke-related deaths and liver damage at slaughter as welfare indicators