Table I.
Serogroup, variants of genes of the locus of enterocyte effacement (LEE), and type of verotoxin (VT) of strains of attaching and effacing Escherichia coli (AEEC) isolated from cattle
| Number of strains | Gene and variant
|
Type of VTb | |||||
|---|---|---|---|---|---|---|---|
| Source and serogroup | eaeb | tir | espA | espBb | espD | ||
| Healthy cattle | |||||||
| O5 | 1 | β1 | β1 | β1 | β | β1 | 1 |
| O5a | 1 | γ2/θ | γ2/θ | NT | α | NT | |
| O10a | 3 | γ2/θ | γ2/θ | NT | α | NT | |
| O20 | 1 | γ2/θ | γ2/θ | NT | α | NT | |
| O26a | 6 | β1 | β1 | β1 | β | β1 | |
| O49 | 1 | ι | α1 | β2 | α | NT | |
| O51a | 1 | β1 | β1 | β1 | β | β1 | |
| O71 | 1 | ι | β1 | β1 | β | β1 | |
| O71 | 1 | ξ | β1 | β1 | β | β1 | |
| O84 | 1 | ζ | α1 | NT | α | NT | 1 |
| O85 | 1 | β1 | β1 | β1 | β | β1 | |
| O98 | 1 | ζ | α1 | NT | α | NT | 1 |
| O98 | 1 | ι | γ1 | NT | γ | γ1 | |
| O103 | 1 | β1 | β1 | β1 | β | β1 | 1 |
| O111 | 2 | γ2/θ | γ2/θ | NT | α | NT | 1, 2 |
| O145a | 2 | γ1 | γ1 | NT | γ | γ1 | |
| O146 | 1 | γ2/θ | γ2/θ | NT | α | NT | |
| O156 | 4 | γ2/θ | γ2/θ | NT | α | NT | |
| O172 | 1 | β1 | β1 | β1 | β | β1 | 2 |
| O177a | 2 | β1 | β1 | β1 | β | β1 | |
| NT | 1 | γ1 | γ1 | NT | γ | γ1 | |
| NT | 2 | ζ | α1 | NT | α | NT | |
| NT | 1 | ι | α1 | β2 | α | NT | |
| NT | 1 | ι | β1 | β1 | β | β1 | |
| Diarrheic calves | |||||||
| O4 | 3 | ι | β1 | β1 | β | β1 | |
| O4 | 2 | ξ | β1 | β1 | β | β1 | |
| O5 | 1 | β1 | β1 | β1 | β | β1 | 1 |
| O14 | 2 | β1 | β1 | β1 | β | β1 | |
| O17 | 1 | γ2/θ | γ2/θ | NT | α | NT | |
| O26 | 5 | β1 | β1 | β1 | β | β1 | 1 |
| O26a | 3 | β1 | β1 | β1 | β | β1 | |
| O111 | 1 | β1 | β1 | β1 | β | β1 | |
| O123 | 1 | ι | β1 | β1 | β | β1 | |
| O125 | 1 | γ2/θ | γ2/θ | NT | α | NT | |
| O128 | 1 | β1 | β1 | β1 | β | β1 | 1 |
| O145 | 1 | γ1 | γ1 | NT | γ | γ1 | 1 |
| O153a | 1 | β1 | β1 | β1 | β | β1 | |
| O180 | 1 | ρ | NT | NT | β | NT | |
| NT | 1 | ζ | α1 | NT | α | NT | |