TABLE 5.
Tetracyclines: susceptibility and resistance determinants of invasive non-beta-hemolytic Streptococcus isolatesa
| Streptococcus group | Resistant isolates, n (%) | Resistance determinant, n (%)b |
||||
|---|---|---|---|---|---|---|
| tet(M) | tet(L) | tet(O) | tet(T) | Unknown | ||
| anginosus, n = 172 | 52 (30.2%) | 42 (80.8%) | 0 (0%) | 7 (13.5%) | 1 (1.9%) | 2 (3.8%) |
| bovis/equinus, n = 77 | 54 (70.1%) | 37 (68.5%) | 18 (33.3%) | 16 (20.8%) | 0 (0%) | 0 (0%) |
| mitis, n = 148 | 24 (16.2%) | 23 (95.8%) | 0 (0%) | 1 (4.2%) | 0 (0%) | 0 (0%) |
| mutans, n = 5 | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) |
| salivarius, n = 39 | 3 (7.7%) | 3 (100%) | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) |
| sanguinis, n = 81 | 25 (30.9%) | 24 (96.0%) | 0 (0%) | 0 (0%) | 0 (0%) | 1 (0%) |
| Total, n = 522 | 158 (30.3%) | 129 (81.6%) | 18 (11.4%) | 24 (15.2%) | 1 (0.6%) | 3 (1.9%) |
a
Interpreted according to the guidelines on Antibiotic Susceptibility Testing of the French Society for Microbiology.
b
Percentages are relative to total resistant isolates within each group.