| Characteristic | Bovine source | Ovine Source |
| Toxins | stx1c/stx1 & stx2c | stx1 |
| Haemolysin | ehxA | ehxA |
| Intimin | - | eaeb |
| Urease | - | + |
| Animal source | Healthy sheep | Calves with diarrhoea |
| Human Pathology | HUS | Diarrhoea & (? HUS) |