Table 1 Definitions of the bTB herd risk classifications and terminology used to describe the movement history of imported cattle

Herd risk classifications

   • Slaughter case

   • A herd where at least one animal was found to have visible lesions consistent with bTB on routine slaughter inspection.

   • Confirmed positive RHT

   • An RHT observation where at least one SICCT reactor or inconclusive reactor was identified and subsequently confirmed to have bTB through visible lesions at post-mortem or culturing M. bovis.

   • Unconfirmed positive RHT

   • An RHT observation where at least one positive SICCT reactor was identified, but never confirmed to have bTB through visible lesions at post-mortem or culturing M. bovis.

   • Unconfirmed inconclusive RHT

   • An RHT observation where only inconclusive SICCT reactors were identified, but never confirmed to have bTB through visible lesions at post-mortem or culturing M. bovis.

   • Non-negative RHT

   • An RHT observation where at least one positive or inconclusive SICCT reactor was identified. This includes confirmed positive, unconfirmed positive, and unconfirmed inconclusive RHT observations.

   • Negative RHT

   • An RHT observation where no cattle reacted positively or inconclusively to SICCT.

Movement history categories

   • Overseas

   • Cattle imported from the Republic of Ireland, Northern Ireland, or other overseas locations.

   • High incidence parish

   • Cattle imported from parishes of England and Wales with a testing interval of 12 or 24 months.

   • Low incidence parish

   • Cattle imported from parishes of England and Wales with a testing interval of 36 or 48 months.

   • High risk import

   • Cattle imported from overseas or from high incidence parishes of England and Wales.