While some large animals are available from commercial breeders, others are not, and it may be economical for some tissues to be obtained from abattoirs (cattle, pigs).
Atypical BSE, by contrast, has so far not been confirmed in clinical suspects: it has been found in either apparently healthy cattle at abattoirs, cattle that were subject to emergency slaughter or in fallen stock and may suggest that the clinical presentation is different to C-type BSE.
The disease was originally encountered among abattoir workers, cattle ranchers, and dairy farmers in Australia and later among sheep ranchers, and it was first thought to be restricted to that continent.
Livestock slaughtered at this abattoir include cattle, goats, sheep, and camels originating from Al-Ahsa aneighboringing provinces.
The first sentinel selection approach, which we refer to as abattoirs open all weeks, uses data from abattoirs processing cattle 52 weeks per year.
It may be advantageous to conduct enhanced surveillance at carefully selected sentinel abattoirs rather than at the approximately 100 abattoirs slaughtering cattle in Ontario [14].
Provincially-inspected abattoirs can be found throughout Ontario; however, over 80% of abattoirs processing cattle are located in Southern, Western and Central Ontario regions.
Abattoirs for each sentinel selection approach were chosen from a total of 98 abattoirs processing cattle for the entire study period.
The bulk of the samples were obtained at abattoirs from cattle of the Kafue Basin and from other areas supplying cattle to the main abattoirs of Lusaka, the capital city of Zambia.
This number is consistent with the current number of abattoirs processing cattle in Ontario in 2014 [14].
