TABLE 4.
Frequencies and combinations of stx genotypes in STEC strains from food
| stx gene(s)a | No. (%) of strains |
|---|---|
| stx1 | 22 (10.0) |
| stx1c | 16 (7.3) |
| stx1d | 3 (1.4) |
| stx1 + stx2/stx2d | 37 (16.9) |
| stx1 + stx2-O118 | 2 (0.9) |
| stx1c + stx2-O118 | 8 (3.7) |
| stx2/stx2d | 52 (23.7) |
| stx2/stx2d + stx2-O118 | 3 (1.4) |
| stx2/stx2d + stx2g | 3 (1.4) |
| stx2-O118 | 25 (11.4) |
| stx2e | 42 (19.2) |
| stx2g | 6 (2.7) |
a
stx2/stx2d indicates that the strains carry the stx2 and/or the stx2d gene. Further association of stx2 and stx2d genes with different stx types is presented in Table 5.