Table 2.
Bacterial strains used in the study.
| Strain ID | Serogroup | Source | Country | Virulence traits |
|---|---|---|---|---|
| Sakai | O157 | Radish sprouts | Japan | stx 1, stx 2 , eaeA, ehxA |
| ATCC 43895 | O157 | Ground beef | USA | stx 1, stx 2 , eaeA, ehxA |
| EC543a | O157 | Cattle feces | Australia | stx 1, stx 2 , eaeA, ehxA |
| EC6a | O157 | Cattle feces | Australia | stx 2 , eaeA, ehxA |
| 1 UPMa | O157 | Bovine milk | Malaysia | stx 1, stx 2 , eaeA, ehxA |
| 2 UPMa | O157 | Bovine milk | Malaysia | stx 1, stx 2 , eaeA, ehxA |
| 3 UPMa | O157 | Beef | Malaysia | stx 1, stx 2 , eaeA, ehxA |
| 4 UPMa | O157 | Beef | Malaysia | stx 1, stx 2 , eaeA, ehxA |
| MG1655 (E. coli K-12) | OR:H48:K-b | Laboratory strain | USA | None |
| EC3008ac | O26 | Cattle feces | Australia | eaeA |
| EC3009ac | O45 | Cattle feces | Australia | None |
| EC2998ac | O103 | Cattle feces | Australia | None |
| EC3113ac | O111 | Cattle feces | Australia | None |
| EC3111ac | O121 | Cattle feces | Australia | None |
aProvided by Professor Son Radu at Universiti Putra Malaysia.
bOR = O antigen rough strain which does not produce a typeable O antigen.
c E. coli non-O157 strains used as controls in the study, provided by Lesley Duffy at CSIRO, Brisbane, Australia.