Table 3.
Minor errors (mE), major errors (ME), and very major errors (VME) for disc diffusion versus MIC testing for Bacteroides fragilis group isolates (BFGI).
| BFGI (109) * | AMC | TZP | IMP | CC | MOX | MTZ |
|---|---|---|---|---|---|---|
| Discrepant results % (n) | 5.5% (6) | 43.1% (47) | 9.2% (10) | 11.9% (13) | 18.3% (20) | 30.3% (33) |
| mE | 2.8% (3) | 11% (12) | 0 | n.a. | 12.8% (14) | n.a. |
| ME | 0 | 40.7% (35) | 8.4% (9) | 16.7% (9) | 3.6% (2) | 30.2% (32) |
| VME | 37.5% (3) | 0 | 50% (1) | 7.3% (4) | 10.3% (4) | 33.3% (1) |
| Total errors | 45.8% | 51.7% | 58.4% | 24% | 26.7% | 63.5% |
AMC, amoxicillin/clavulanic acid; TZP, piperacillin/tazobactam; IMP, imipenem; CC, clindamycin; MOX, moxifloxacin; MTZ, metronidazole; mE, minor error (disc diffusion = S or R and reference method = I), ME, major error (disc diffusion = R and reference method = S), VME, very major error (disc diffusion = S and reference method = R); n.a., not applicable, because no I interpretation; * 1 strain not readable in disc diffusion test.