Sheep measles

General description

  • Sheep measles are the cystic stage of the dog tapeworm Taenia ovis.
  • The cysts occur in the muscles of the sheep.
  • Sheep measles do not cause any ill health to affected sheep but can cause economic loss due to carcase condemnation at slaughter.


  • Sheep measles occurs when sheep ingest tapeworm eggs from contaminated pastures.

Clinical signs

  • There are no clinical signs in live sheep, however, at slaughter infected carcasses may be trimmed or condemned.


  • Sheep measles is detected by examining the muscles after slaughter.


  • There is no effective treatment for sheep measles.


  • Sheep measles can be prevented through monthly dog worming with a wormer that controls tapeworm and by restricting dog access to raw sheep meat and offal.

Learn more

Fact Sheet - Sheep Measles

Sheep Measles cause condemnations

Sheep Measles Potentially costly but easily fixed