Ark Veterinary Centre


Jun 17, 2018

Have you checked the Nematodirus forecast recently? Our area is showing as high to very high risk. Main risk factors include lambs that are eating significant amounts of grass, usually 6-12 weeks old but may be younger as milk yields have been poor this year. Also lambs that are grazing pasture that was grazed by lambs last spring. If possible, avoid infection by moving at risk lambs to low risk pastures. We advise farmers to use a white drench (1-BZ) drench. These are still highly effective amongst this parasite. All You Need to Know About Coccidiosis in Lambs


  • Caused by the protozoan Eimeria spp.
  • Seen in late born, 4-12wk old lambs loosing weight with diarrhoea containing blood causing staining of the perineum and tail.
  • Clinical disease may be exacerbated by a stressful event such as adverse weather, weaning or sudden diet change.
  • Main risk factors include; faeces in water supply, dirty conditions around feeding troughs, heavy stocking densities and mixing of young with older lambs. It is important to move feed troughs regularly.
  • Diagnose by sending faecal samples to the lab for speciation.
  • Medicated feed with decoquinate (Deccox) will suppress the   disease but not eliminate it.
  • Sheep must be moved to clean pasture as soon as the disease becomes apparent. Diclazuril (Vecoxan) and toltrazuril (Tolracol) can be used for treatment and prophylaxis of coccidiosis in lambs
  • Medication will depend upon individual farm circumstances.  Consult vet for targeted treatment choices.

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