Table 4. Serotype and virulence genes of verotoxigenic E. coli isolates collected from irrigation water at three sites each in the Sumas and Serpentine watersheds of the Lower Mainland of British Columbia.
| Serotype | Site | Month collected | vt1 | vt2 | eaeA | hlyA |
|---|---|---|---|---|---|---|
| O103:H2 | Sumas 1 | Feb 2015 | + | - | + | + |
| O109:H5 | Sumas 1 | Mar 2015 | + | - | - | - |
| O116:H25 | Serpentine 2 | May 2015 | - | + | + | + |
| Unknown 1a | Serpentine 2 | Sep 2015 | - | + | + | + |
| O153:NM | Sumas 1 | Nov 2015 | - | + | + | - |
| O76:H19 | Sumas 1 | Feb 2016 | + | - | - | + |
| O69:H11 | Serpentine 2 Serpentine 2 |
Feb 2016 Mar 2016 |
+ | - | + | + |
| Unknown 2a | Serpentine 2 | Apr 2016 | - | + | + | + |
| O34:H2 | Sumas 3 | May 2016 | - | + | + | - |
| O22:H8 | Serpentine 3 | May 2016 | + | - | - | + |
aThese strains were not isolated for serotyping.