TABLE 1.
Total calf and dam samples tested and ECO157 isolates detected, by herd
| Dairy herd | Total calves sampled, n | Calves with isolates containing only rfb, n (%)a | Total dams sampled, n | Dams with isolates containing only rfb, n (%) | Dams with isolates containing rfb and stx2, n (%)b | Dams with isolates containing rfb and eaeA, n (%)c |
|---|---|---|---|---|---|---|
|
| ||||||
| 1 | 179 | 0 | 53 | 11 (20.8) | 1 (1.8) | 0 |
| 2 | 70 | 0 | 15 | 2 (2.8) | 0 | 0 |
| 3 | 150 | 1 (0.7) | 43 | 22 (51.2) | 0 | 1 (2.3) |
| Total | 399 | 1 (0.3) | 111 | 35 (31.5) | 1 (0.9) | 1 (0.9) |
a
E. coli O157.
b
E. coli Shiga toxin gene 2.
c
E. coli attaching and effacing gene.