TABLE 4.
Secondary transfer of antibiotic resistance genes from transconjugants to E. faecalis JH2-SS
| Donor straina | Frequency (no. of transconjugants/recipient)b |
|---|---|
| Bu-224 | 2.4 × 10−5 (0.8) |
| Bu-477 | 7.8 × 10−7 (3.2) |
| Bu-487 | 6.4 × 10−6 (2.4) |
| JH2-224 | ND |
| JH2-477 | 7.5 × 10−8 (0.1) |
| JH2-487 | 1.0 × 10−7 (0.66) |
| TRC 1 (IBB477) | 1.2 × 10−8 (1.5) |
| TRC 2 (IBB477) | 1.4 × 10−8 (0.9) |
| TRC 3 (IBB487) | 3.6 × 10−8 (4.2) |
| TRC 4 (IBB487) | 1.0 × 10−8 (0.4) |
a
TRC 1 and TRC 2 are in vivo transconjugants of IBB477 and E. faecalis JH2-2; TRC 3 and TRC 4 are in vivo transconjugants of IBB487 and E. faecalis JH2-2.
b
ND, not detected (transfer frequency of <10−9 per recipient cell). Average values for five or three (in the case of secondary transfer from in vivo transconjugants TRC 1, 2, 3, and 4) different trials are given, with standard deviations in parentheses.