Table 3. Antimicrobial activities against 44 Bacteroides fragilis group isolates in 2012.
| Antimicrobial agents | Bacteroides fragilis (32) | B. fragilis group, other species (12)b | ||||||
|---|---|---|---|---|---|---|---|---|
| MIC (µg/mL) | % Susceptibilitya | MIC (µg/mL) | % Susceptibilitya | |||||
| Range | 90% | S | R | Range | 90% | S | R | |
| Piperacillin | 2->256 | 128 | 75 | 13 | 128->256 | >256 | 0 | 100 |
| Piperacillin-tazobactam | 0.25-128 | 2 | 97 | 3 | 0.03-256 | 128 | 75 | 17 |
| Cefoxitin | 8-128 | 16 | 91 | 9 | 4-64 | 32 | 25 | 8 |
| Cefotetan | 4-256 | 32 | 81 | 9 | 8-256 | 256 | 17 | 67 |
| Imipenem | 0.06-32 | 1 | 97 | 3 | 0.06-8 | 8 | 83 | 0 |
| Meropenem | 0.12-256 | 1 | 91 | 6 | 0.125-4 | 2 | 100 | 0 |
| Clindamycin | 0.03-256 | 256 | 50 | 50 | 2-256 | 256 | 17 | 67 |
| Moxifloxacin | 0.25-32 | 8 | 78 | 16 | 0.5-64 | 32 | 75 | 25 |
| Chloramphenicol | 4-8 | 8 | 100 | 0 | 4-8 | 8 | 100 | 0 |
| Metronidazole | 0.5-4 | 4 | 100 | 0 | 1-2 | 2 | 100 | 0 |
aS, susceptible; R, resistant.
bBacteroides thetaiotaomicron (n=6), B. caccae (n=2), B. ovatus (n=2), B. vulgatus (n=2).