Table 1.
Distribution according to presence of stx and eae of non-O157 EHEC O groups based on PCR of commercial ground beef sample enrichments
| Genotypic characterization of sample(s) | Total no. of samples | Total no. (%) O group positivea | No. (%) with O group: |
|||||
|---|---|---|---|---|---|---|---|---|
| O26 | O45 | O103 | O111 | O121 | O145 | |||
| All samples | 3,972 | 753 (19.0) | 218 (5.5) | 186 (4.7) | 306 (7.7) | 2 (0.1) | 220 (5.5) | 2 (0.1) |
| stxb eae negative | 2,613 | 324 (12.4) | 74 (2.8) | 90 (3.4) | 112 (4.3) | 1 (0.03) | 79 (3.0) | 1 (0.0) |
| stx only | 544 | 107 (19.7) | 24 (4.4) | 28 (5.1) | 49 (9.0) | 0 (0.0) | 37 (6.8) | 0 (0.0) |
| eae only | 400 | 139 (34.8) | 46 (11.5) | 34 (8.5) | 61 (15.3) | 1 (0.3) | 33 (8.3) | 0 (0.0) |
| stx eae | 415 | 183 (44.1) | 74 (17.8) | 34 (8.2) | 84 (20.2) | 0 (0.0) | 71 (17.1) | 1 (0.2) |
a
Number of sample enrichments that had one or more O groups identified as present by PCR.
b
stx characterization includes stx1 and stx2.