Table 2 Risk group classification of STEC strains from asymptomatic carriers
Risk group | Serotype | presence of stx2a and LEE | No. of strains |
|---|---|---|---|
high-risk | O157:H7(H-), O26:H11(H-), O111:H8(H-), O121:H19(H-), O145:28(H-) | regardless | 31 |
others | both positive | 4 | |
moderate-risk | others | either positive | 178 |
low-risk | others | both negative | 282 |
Total | Â | Â | 495 |
