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ure genes and ureolytic activity in EHEC O157 and E. coli O55:H7 strains
| Serotype | No. of isolates | No. PCR positive for ure genes (ureA, -B, -C, -D, -E, -F, and -G) | No. positive for ureolytic activity by:
|
|
|---|---|---|---|---|
| Christensen agar | API 20E | |||
| O157:H7 | 59 | 58 | 1a | 1a |
| SF O157:NM | 82 | 0 | 0 | 0 |
| E. coli O55:H7 | 9 | 0 | 0 | 0 |
The strain that tested positive with the API 20E is identical to the strain that tested positive on Christensen agar.
