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Tetracycline resistance and occurrence of tetracycline resistance genes among 100 bifidobacterial strains of seven species.
| Species | Total strain number | Tetracycline resistant strains | tet(W) | tet(O) | tet(S) |
|---|---|---|---|---|---|
| B. adolescentis | 2 | 0 | − | − | − |
| B. infantis | 1 | 0 | − | − | − |
| B. longum | 45 | 7 | 2 | 5 | − |
| B. lactis | 19 | 13 | 13 | − | − |
| B. pseudocatenulatum | 12 | 6 | 4 | 1 | 1 |
| B. breve | 18 | 1 | − | − | 1 |
| B. bifidum | 3 | 2 | 2 | − | − |
| Total | 100 | 29 | 21 | 6 | 2 |
