TABLE 1.
Strain no. (designation) | Hospital (city) (yr of isolation) | Hemolysis | Antibiotic resistance markers of wild-type strain | Frequency of conjugative transfer of Gmr marker into JH2-2 | Antibiotic resistance markers of transconjugantsb | Gmr plasmid in transconjugants or wild-type strains |
---|---|---|---|---|---|---|
1 (D362)c | Hotel Dieu (Paris) (1978) | β | Cmr Emr Gmr-Kmr Tcr-Mnr | 7 × 10−2 | Cmr Gmr-Kmr | pIP655 |
2 (D367) | Hotel Dieu (Paris) (1978) | β | Cmr Emr Gmr-Kmr Tcr-Mnr | 2 × 10−1 | Cmr Gmr-Kmr | pIP687 |
3 (D366) | Boucicaut (Paris) (1978) | β | Cmr Emr Gmr-Kmr Tcr-Mnr | 3 × 10−2 | Cmr Gmr-Kmr | pIP683 |
4 (8942) | Broussais (Paris) (1981) | β | Cmr Emr Gmr-Kmr Tcr-Mnr | 1 × 10−1 | Cmr Gmr-Kmr | pIP1722 |
5 (8943) | Broussais (Paris) (1981) | NH | Cmr Emr Gmr-Kmr | <1 × 10−9 | NA | pIP1723d |
6 (D396) | Broussais (Paris) (1983) | NH | Cmr Emr Gmr-Kmr Tcr-Mnr | 3 × 10−6 | Cmr Gmr-Kmr | pIP1724 |
7 (9636) | Broussais (Paris) (1984) | NH | Cmr Emr Gmr-Kmr Tcr-Mnr | 2 × 10−5 | Gmr-Kmr | pIP1730 |
8 (10028) | Broussais (Paris) (1985) | NH | Cmr Emr Gmr-Kmr Tcr-Mnr | 1 × 10−5 | Gmr-Kmr | pIP1731 |
9 (10029) | Broussais (Paris) (1985) | NH | Gmr-Kmr Tcr-Mnr | 3 × 10−6 | Gmr-Kmr | pIP1732 |
10 (10035) | Broussais (Paris) (1985) | NH | Emr Gmr-Kmr Tcr-Mnr | <1 × 10−9 | NA | pIP1733d |
11 (10042) | Broussais (Paris) (1985) | NH | Gmr-Kmr Tcr-Mnr | <1 × 10−9 | NA | NA |
12 (10628) | Broussais (Paris) (1988) | NH | Emr Gmr-Kmr Tcr-Mnr | <1 × 10−9 | NA | NA |
13 (10586) | Broussais (Paris) (1988) | β | Emr Gmr-Kmr Tcr-Mnr | 1 × 10−1 | Gmr-Kmr | pIP1734 |
14 (10619) | Broussais (Paris) (1988) | β | Cmr Emr Gmr-Kmr Tcr-Mnr | 1 × 10−2 | Emr Gmr-Kmr | pIP1735 |
15 (10629) | Broussais (Paris) (1988) | β | Cmr Emr Gmr-Kmr Tcr-Mnr | 2 × 10−3 | Cmr Emr Gmr-Kmr | pIP1736 |
16 (10630) | Broussais (Paris) (1988) | β | Cmr Emr Gmr-Kmr Tcr-Mnr | 2 × 10−3 | Cmr Emr Gmr-Kmr | pIP1737 |
17 (10282) | Saint-Joseph (Paris) (1986) | NH | Cmr Emr Gmr-Kmr Tcr-Mnr | <1 × 10−9 | NA | NA |
18 (9850) | Pontchaillou (Rennes) (1984) | NH | Cmr Emr Gmr-Kmr Tcr-Mnr | <1 × 10−9 | NA | pIP1725d |
19 (9851) | Pontchaillou (Rennes) (1984) | NH | Cmr Emr Gmr-Kmr Tcr-Mnr | 1 × 10−5 | Gmr-Kmr | pIP1726 |
20 (9852) | Pontchaillou (Rennes) (1984) | NH | Cmr Emr Gmr-Kmr Tcr-Mnr | 1 × 10−5 | Gmr-Kmr | pIP1727 |
21 (9853) | Pontchaillou (Rennes) (1984) | NH | Cmr Emr Gmr-Kmr Tcr-Mnr | 1 × 10−5 | Gmr-Kmr | pIP1728 |
22 (9854) | Pontchaillou (Rennes) (1984) | NH | Cmr Emr Gmr-Kmr Tcr-Mnr | 1 × 10−5 | Gmr-Kmr | pIP1729 |
23 (10703) | (Chateauroux) (1989) | β | Cmr Emr Gmr-Kmr Tcr-Mnr | 2 × 10−2 | Emr Gmr-Kmr | pIP1738 |
24 (10907) | (Longjumeaux) (1990) | NH | Cmr Emr Gmr-Kmr Tcr-Mnr | <1 × 10−9 | NA | NA |
Abbreviations: β, beta-hemolysis; Gmr-Kmr, high-level gentamicin-kanamycin resistance; NA, not applicable; NH, nonhemolytic.
All the transconjugants studied were nonhemolytic.
Reference 9 for strains 1 to 3; this study for strains 4 to 24.
Plasmid isolated from the wild-type strains.