Table 3.
Serotypes and virulence genes in VTEC strains isolated from sheepa
| Source and serotype | No. of strains | vt genotype (no. of strains) | No. of strains positive forb: |
|||
|---|---|---|---|---|---|---|
| subAB2 | tia | ehxA | eae | |||
| Healthy sheep | ||||||
| O5:HNMc | 13 | vt1c (7), vt1c + vt2 (6) | 13 | 3 | 13 | 0 |
| O6:H10 | 3 | vt1c (3) | 0 | 0 | 0 | 0 |
| O21:H21 | 1 | vt1c + vt2 (1) | 1 | 1 | 0 | 0 |
| O26:H11 | 1 | vt1 + vt2 (1) | 0 | 0 | 1 | 1 |
| O71:HNM | 1 | vt1c + vt2 (1) | 1 | 1 | 0 | 0 |
| O75:H8 | 1 | vt1c + vt2 (1) | 1 | 1 | 1 | 0 |
| O91:HNM | 6 | vt1 + vt2 (5), vt1c + vt2 (1) | 6 | 6 | 0 | 0 |
| O128:HNM | 6 | vt1c (3), vt1c + vt2 (3) | 5 | 5 | 0 | 0 |
| O128:H16 | 1 | vt1c (1) | 1 | 1 | 0 | 0 |
| O141:HNM | 1 | vt1c (1) | 1 | 1 | 1 | 0 |
| O146:H21 | 8 | vt1c + vt2 (8) | 8 | 8 | 8 | 0 |
| O163:HNM | 1 | vt1 + vt2 (1) | 1 | 0 | 1 | 0 |
| O163:H11 | 1 | vt1 + vt2 (1) | 1 | 1 | 0 | 0 |
| O166:HNM | 1 | vt1c + vt2 (1) | 1 | 1 | 1 | 0 |
| O166:H28 | 4 | vt1c (2), vt1c + vt2 (2) | 4 | 0 | 4 | 0 |
| ONTd:HNM | 9 | vt1c (3), vt1c + vt2 (6) | 9 | 8 | 3 | 0 |
| ONT:H4 | 2 | vt1c (2) | 2 | 0 | 2 | 0 |
| Diarrheic lambs | ||||||
| O71:HNM | 1 | vt1c + vt2 (1) | 1 | 1 | 0 | 0 |
| O110:HNM | 1 | vt1c (1) | 0 | 0 | 0 | 0 |
| ONT:HNM | 1 | vt1c (1) | 0 | 0 | 0 | 0 |