Table 3.
Serotyping results and PCR using rmlA/C primers for O62/O68 field strains.
| O62/68 Field Strain Designation (ECRC#) a | Serotyping Using O62 Antiserum | Serotyping Using O68 Antiserum | Serogroup by PCR Using rmlA/C Primers |
|---|---|---|---|
| 12.0591 | Positive | Positive | O62 (1969 bp) |
| 94.0296 | Positive | Positive | O68/O62 (1172 bp) b |
| 1.2557 | Negative | Positive | O68 |
| 3.1263 | Negative | Positive | O68 |
| 4.0175 | Negative | Positive | O68 |
| 4.2378 | Negative | Positive | O68 |
| 5.1791 | Negative | Positive | O68 |
| 6.2334 | Negative | Positive | O68 |
a ECRC#—E. coli Reference Center strain designation; b Although this strain was positive using both O62 and O68 antisera similar to O62 strain 12.0591 and the O62 reference strain, it did not show the presence of the insertion element by PCR.