TABLE 6.
Exclusion index values for prototypic incompatibility groups in C. fetus subsp. venerealis conjugative mobilization
| E. coli recipient strain | Inc group | Frequency (transconjugants/donor) |
Conjugation frequency (%) |
Pa | EIb | ||
|---|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | ||||
| MT102 | None | 1.26 × 10−5 | 1.6 × 10−6 | 100 | 13 | ||
| MT102(RP4) | IncP | 3.96 × 10−7 | 4.2 × 10−8 | 3 | 0 | 0.006 | 31.7 |
| MT102(pSU2007) | IncW | 2.36 × 10−5 | 8.9 × 10−6 | 188 | 70 | 0.158 | 0.5 |
| MT102(pAR119) | IncF | 7.41 × 10−6 | 3.4 × 10−7 | 59 | 3 | 0.028 | 1.7 |
| MT102(pLG211) | IncI | 1.11 × 10−5 | 1.0 × 10−6 | 89 | 8 | 0.278 | 1.1 |
a
P values refer to the statistical significance distinguishing transfer frequencies to plasmid-free recipients and plasmid-carrying E. coli (unpaired t test).
b
The exclusion index (EI) expresses the fold difference in transfer frequency to plasmid-free recipients versus plasmid-carrying E. coli.