TABLE 1.
Herds sampled for STEC and number of positive cattle per herda
| Herd | Type | Total no. of animals | No. (%) of animals sampled | No. (%) of STEC-positive animals | Yr of sampling |
|---|---|---|---|---|---|
| B1 | Beef | 136 | 136 (100) | 11 (8.2) | 2011 |
| D2 | Dairy | 320 | 154 (48) | 13 (8.7) | 2011 |
| B3 | Beef | 36 | 36 (100) | 3 (9.4) | 2011 |
| D4 | Dairy | 3,000 | 175 (9) | 24 (13.8) | 2011 |
| D6 | Dairy | 98 | 94 (96) | 6 (6.4) | 2011 |
| D7 | Dairy | 12,000 | 100 (1) | 13 (13.0) | 2012 |
| B8 | Beef | 54 | 54 (100) | 29 (53.7) | 2012 |
| D9 | Dairy | 243 | 100 (41) | 28 (28.0) | 2012 |
| D10 | Dairy | 530 | 101 (19) | 11 (10.9) | 2012 |
| B11 | Beef | 83 | 83 (100) | 13 (15.7) | 2012 |
| B12 | Beef | 75 | 75 (100) | 24 (32.0) | 2012 |
a
Samples were lost from 12 animals from herds B1 (n = 2), D2 (n = 5), B3 (n = 4), and D4 (n = 1).