TABLE 5.
Frequency of conjugative transfer of environmental plasmids from the group III-4a.
| Mating |
Transconjugants frequency (per recipient)* | |
| Donor | Recipient | |
| ED45-25 | BD413rif | 4.5 × 10–3 |
| KHP18 | BD413rif | 2.5 × 10–3 |
| NC13-1 | BD413rif | 1.5 × 10–6 |
| LS12-1 | BD413rif | 2.3 × 10–7 |
| Z13-16 | BD413rif | 2.2 × 10–1 |
| W14 | BD413rif | 5.5 × 10–2 |
| ANS7-7 (Tc-R) | BD413rif | 2.7 × 10–3 |
| ANS7-7 (Str-R) | BD413rif | 6.2 × 10–2 |
| WCHAW010062 | BD413rif | 2.0 × 10–7 |
*Average of three experiments. To rule out that the transconjugants were not spontaneous rifampicin mutants of donor cells the morphological characters of isolated colonies from matings and donor cells were compared because these in parental strains are differed significantly.