Research and analysis

Sheep: TSE surveillance statistics

Statistics on the active and passive surveillance of transmissible spongiform encephalopathies (TSEs) in sheep in Great Britain.


TSE surveillance statistics: sheep

This file may not be suitable for users of assistive technology. Request an accessible format.

If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email Please tell us what format you need. It will help us if you say what assistive technology you use.


Cases of TSE disease found in sheep from passive surveillance have been recorded since 1993. The European Union active surveillance started in January 2002.

In active surveillance, the number of sheep sampled in the testing programme has varied each year . It has included:

  • a sample of fallen sheep over 18 months of age.
  • a sample of healthy slaughtered sheep over 18 months of age.

Cases which have been identified from flocks in the Compulsory Scrapie Flock Scheme (CSFS) are shown separately.

APHA attempt to trace all cases of scrapie back to their natal (birth) flock so that it can confirm disease on the appropriate premises and control measures can be applied. In some cases this can take time. Where a final decision has not been made on where to confirm disease, the case is included in the number of pending cases.

The following reports are also available:

Published 6 October 2015
Last updated 15 April 2019 + show all updates
  1. Statistics updated
  2. Statistics for February 2019 now available
  3. TSE surveillance statistics: sheep updated
  4. Document updated
  5. Document updated
  6. TSE surveillance statistics: sheep updated
  7. Sheep TSE surveillance statistics updated
  8. Document updated
  9. Document updated
  10. Document updated
  11. Sheep document updated
  12. Document updated
  13. Documents updated
  14. Document updated
  15. Updated document - January 2018
  16. Updated document
  17. Updated document
  18. Document updated
  19. Updated document
  20. Updated document
  21. Updated document
  22. Document updated
  23. Document updated
  24. Document updated
  25. Sheep document updated
  26. Updated sheep document
  27. Document updated
  28. Document updated
  29. Sheep document updated
  30. Sheep document updated
  31. Sheep document updated
  32. Sheep document updated
  33. Sheep document updated
  34. Document updated
  35. Sheep document updated
  36. Document updated
  37. Sheep document updated
  38. Sheep document updated
  39. Document updated for December 2015
  40. Document updated for November 2015
  41. Updated document for October 2015
  42. Sheep publication updated.
  43. First published.
  44. Document updated for May 2015
  45. Statistics updated as of 28th Feb
  46. AHVLA documents have been re-assigned to the new Animal and Plant Health Agency (APHA).