TABLE 5.
Characterization and transferability of resistance in E. coli isolates classified into phylogenetic groups B2 and D
| Strain | Phylogenetic group | Resistance phenotypea | Resistance gene | MICb (μg/ml) |
Plasmid replicon typec | Transconjugants |
||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TET | OXY | CTC | DOX | MIN | Transferability | tet gene | Plasmid replicon typec | |||||
| 60 | B2 | TE, S | tet(B) | 256 | 512 | 1,024 | 32 | 8 | FIB, Y, I1, Frep | + | tet(B) | FIB, I1, Frep |
| 61 | B2 | TE, S | tet(B) | 256 | 512 | 1,024 | 32 | 16 | FIB, Y, I1, Frep | − | ||
| 62 | B2 | TE, S | tet(B) | 256 | 512 | 1,024 | 32 | 8 | FIB, Y, I1 | + | tet(B) | FIB, I1 |
| 64 | B2 | TE, S | tet(B) | 256 | 512 | 1,024 | 32 | 8 | FIB, Y, I1 | + | tet(B) | FIB, I1 |
| 68 | B2 | TE, S | tet(A) | 256 | 512 | 1,024 | 32 | 8 | FIB, Y, I1, Frep | − | ||
| 90 | D | TE, S, AMP | tet(A) | 256 | 512 | 2,048 | 32 | 4 | P, FIA, FIB, Frep | + | tet(A) | FIA, FIB, Frep |
| 106 | D | TE, S | tet(B) | 256 | 512 | 2,048 | 32 | 16 | Frep | + | tet(B) | Frep |
| 123 | D | TE, NA | tet(A) | 256 | 512 | 1,024 | 16 | 2 | FIB, Frep | + | tet(A) | FIB, Frep |
| 124 | D | TE, GN, SXT, C, S, NA, AMP | tet(B) | 256 | 512 | 2,048 | 64 | 8 | FIA, FIB, Frep | + | tet(B) | FIB, Frep |
| 127 | D | TE, S, AMP | tet(A) | 256 | 512 | 2,048 | 32 | 4 | P, I1 | + | tet(A) | I1 |
| 128 | D | TE, AMP | tet(A) | 256 | 512 | 2,048 | 16 | 4 | FIB, I1 | + | tet(A) | Frep, I1 |
| 133 | D | TE, S, NA | tet(A) | 256 | 512 | 1,024 | 2 | 2 | FIB, Frep | + | tet(A) | Frep |
| 135 | D | TE, S, NA | tet(A) | 256 | 512 | 1,024 | 8 | 2 | FIB | + | tet(A) | FIB |
| 136 | D | TE, S, NA | tet(A) | 256 | 512 | 1,024 | 16 | 2 | FIB, Frep | + | tet(A) | FIB |
| 147 | D | TE, S, NA | tet(A) | 256 | 512 | 1,024 | 16 | 2 | FIB | + | tet(A) | FIB |
| 148 | D | TE, S, NA | tet(A) | 256 | 512 | 1,024 | 8 | 2 | FIB, Frep | + | tet(A) | FIB, Frep |
| 152 | D | TE, S, NA | tet(A) | 256 | 512 | 1,024 | 16 | 2 | FIB, Frep | + | tet(A) | FIB, Frep |
| 153 | D | TE, S, NA | tet(A) | 256 | 512 | 1,024 | 16 | 2 | FIB, Frep | + | tet(A) | FIB, Frep |
| 156 | D | TE, S, NA | tet(A) | 256 | 512 | 1,024 | 16 | 2 | FIB, Frep | + | tet(A) | FIB |
| 162 | D | TE, S, NA | tet(A) | 128 | 256 | 1,024 | 32 | 2 | FIB, Frep | + | tet(A) | FIB, Frep |
| 163 | D | TE, S, NA | tet(A) | 128 | 256 | 1,024 | 16 | 2 | FIB, Frep | + | tet(A) | FIB, Frep |
| 164 | D | TE, S, NA | tet(A) | 128 | 256 | 1,024 | 16 | 2 | FIB, Frep | + | tet(A) | FIB, Frep |
| 167 | D | TE, S, NA | tet(A) | 128 | 256 | 1,024 | 16 | 2 | FIB, Frep | + | tet(A) | FIB |
| 172 | D | TE, S, NA | tet(A) | 128 | 256 | 1,024 | 16 | 2 | FIB, Frep | + | tet(A) | FIB |
| 173 | D | TE, S, NA | tet(A) | 128 | 256 | 1,024 | 16 | 2 | FIB, Frep | + | tet(A) | FIB, Frep |
| 174 | D | TE, S, NA | tet(A) | 128 | 256 | 1,024 | 16 | 2 | FIB, Frep | + | tet(A) | FIB, Frep |
| 175 | D | TE, S, NA | tet(A) | 256 | 512 | 1,024 | 8 | 2 | FIB, Frep | + | tet(A) | FIB |
| 177 | D | TE, S, AMP | tet(A) | 64 | 256 | 2,048 | 16 | 4 | P, FIA, FIB, Frep | + | tet(A) | FIB, Frep |
| 178 | D | TE, S, AMP | tet(A) | 64 | 256 | 2,048 | 16 | 4 | P, FIA, FIB, Frep | + | tet(A) | FIB, Frep |
| 192 | D | TE, SXT, C, S, AMP | tet(A) | 256 | 512 | 1,024 | 16 | 2 | P, FIB, Frep | + | tet(A) | FIB, Frep |
| 194 | D | TE, SXT, S, AMP | tet(A) | 128 | 256 | 1,024 | 16 | 2 | Frep | + | tet(A) | Frep |
| 198 | D | TE, SXT, S, AMP | tet(A) | 128 | 256 | 1,024 | 32 | 2 | Frep | + | tet(A) | Frep |
a
TE, tetracycline; S, streptomycin; GN, gentamicin; SXT, sulfamethoxazole-trimethoprim; C, chloramphenicol; NA, nalidixic acid; AMP, ampicillin.
b
TET, tetracycline; OXY, oxytetracycline; CTC, chlortetracycline; DOX, doxycycline; MIN, minocycline.
c
FIB, IncFIB replicon; I1, IncI1 replicon; P, IncP replicon, FIA, IncFIA replicon; Y, IncY replicon.