For the purpose of this Annex, the following definitions shall apply:

1. (a)

   Type A surveillance

   The application of Type A surveillance will allow the detection of BSE at a design prevalence25 of at least one case per 100 000 in the adult bovine animals population in the country or region of concern, at a confidence level of 95 %;

2. (b)

   Type B surveillance

   The application of Type B surveillance will allow the detection of BSE at a design prevalence of at least one case per 50 000 in the adult bovine animals population in the country or region of concern, at a confidence level of 95 %.

   Type B surveillance may be carried out by countries or region of negligible BSE risk status to confirm the conclusions of the risk analysis, for example by demonstrating the effectiveness of the measures mitigating any risk factors identified, through surveillance targeted to maximise the likelihood of identifying failures of such measures.

   Type B surveillance may also be carried out by countries or regions of controlled BSE risk status, following the achievement of the relevant points target using Type A surveillance, to maintain confidence in the knowledge gained through Type A surveillance.

   For the purpose of this Annex, the following four sub-populations of bovine animals have been identified for surveillance purposes:

   1. (a)

      bovine animals over 30 months of age displaying behavioural or clinical signs consistent with BSE (clinical suspects);

   2. (b)

      bovine animals over 30 months of age that are non-ambulatory, recumbent, unable to rise or to walk without assistance; bovine animals over 30 months of age sent for emergency slaughter or with abnormal observations at ante-mortem inspection (casualty or emergency slaughter);

   3. (c)

      bovine animals over 30 months of age which are found dead or killed on farm, during transport or at an abattoir (fallen stock);

   4. (d)

      bovine animals over 36 months of age at routine slaughter.