Table 1.
Positive samples in each animal species for detection of the selected VFs
| E. coli serotype | Origin | No. of strains | No. (%) positive for: |
||||||
|---|---|---|---|---|---|---|---|---|---|
| stx1 | stx2 | eae | ehxAa (pO157) | pInv | ST | rbfO157/fliCH7 | |||
| Non-O157:H7 | Cattle | 256 | 1 (0.4) | 1 (0.4) | 10 (3.9) | NDc | 0 | 3 (1.17) | 3b (1.17) |
| Swine | 278 | 0 | 4 (1.4) | 2 (0.72) | ND | 1 (0.36) | 2 (0.72) | 0 | |
| Broilers | 196 | 0 | 0 | 57 (29.1) | ND | 0 | 0 | 0 | |
| O157:H7 | Cattle | 50 | 33 (66) | 50 (100) | 50 (100) | 50 (100) | 0 | 0 | 50 (100) |
a
As enterohemolysin (ehxA) is present in EHEC strains, it was analyzed only in O157:H7 isolates.
b
rbfO157-positive fliCH7-negative isolates.
c
ND, not determined.