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A second-round passage of R-IVET positives through mice results in an increased percentage of erythromycin-sensitive NZ7109 colonies compared to the first-round passage (3.3%)
| Mouse | Promoter group | Erys (%)a |
|---|---|---|
| 1 | 1 | 58.0 |
| 2 | 1 | 71.7 |
| 3 | 2 | 52.9 |
| 4 | 2 | 28.8 |
| 5 | 3 | 34.2 |
| 6 | 3 | 33.3 |
| 7 | 4 | 31.5 |
| 8 | 4 | 37.5 |
The average of the erythromycin sensitivity (Erys) values for mice 1 to 8 was 38.1%.
