Table 1 Summary of sentinel abattoirs selection approaches for Ontario provincial abattoirs (2001 – 2007)
Sentinel site selection approach | Selection description | Number of abattoirs |
|---|---|---|
Full dataset | Abattoirs processing at least 1 bovine carcass each year of study period (2001 – 2007) | 98 |
Abattoirs open all weeks | Abattoirs processing at least 1 bovine carcass 52Â weeks per year | 45 |
Multi-criteria | Selection of abattoirs meeting the following criteria: processed at least 499 cattle per year, processed at least 1 bovine carcass 44Â weeks or more per year, processed cattle representing all animal classes (calves, cows, heifers and steers) | 44 |
Large abattoirs | Abattoirs processing ≥ 6500 cattle per year | 7 |