Table 5.
Isolation and virulence profiles of E. coli O157 and “big 6” E. coli non-O157 serogroups lacking stx.
| Serogroup | Farm | Source | Number of + samples | Number of isolates tested | Virulence factors | Intimin subtype |
|---|---|---|---|---|---|---|
| O103 | A | Cattle feces | 3 | 3 | None | — |
|
| ||||||
| O157 | B | Cattle feces | 1 | 2 | eaeA | NTa |
| Sheep feces | 2 | 3 |
eaeA (1 isolate) none (2 isolates) |
NT | ||
| Buffalo feces | 3 | 5 | eaeA | NT | ||
|
| ||||||
| O26 | B | Buffalo feces | 2 | 5 | eaeA, ehxA (2 isolates) none (3 isolates) | eaeA-β1 |
|
| ||||||
| O103 | B | Buffalo feces | 1 | 7 | None | — |
|
| ||||||
| O26 | C | Cattle feces | 2 | 11 | None | — |
aNT = non-typable.
—: not applicable.