Table 4.
Categorical agreement and error rates for direct AST compared with culture-dependent AST in Gram-positive bacteria.
| Microorganisms | Antimicrobial agents | No. | Category agreement | Minor error | Major error | Very major error | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| Cefoxitin screen | 10 | 10 | 100% | |||||||
| Staphylococcus ssp. (n = 10) | Benzylpenicillin | 10 | 10 | 100% | ||||||
| Oxacillin | 10 | 9 | 90% | 1 | 10% | |||||
| Gentamicin | 10 | 10 | 100% | |||||||
| Ciprofloxacin | 10 | 7 | 70% | 2 | 20% | 1 | 10% | |||
| Levofloxacin | 10 | 9 | 90% | 1 | 10% | |||||
| Moxifloxacin | 10 | 8 | 80% | 1 | 10% | 1 | 10% | |||
| Erythromycin | 10 | 9 | 90% | 1 | 10% | |||||
| Clindamycin | 10 | 10 | 100% | |||||||
| Quinupristin-dalfopristin | 10 | 10 | 100% | |||||||
| Linezolid | 10 | 10 | 100% | |||||||
| Vancomycin | 10 | 9 | 90% | 1 | 10% | |||||
| Tetracycline | 10 | 10 | 100% | |||||||
| Nitrofurantoin | 10 | 10 | 100% | |||||||
| Rifampicin | 10 | 10 | 100% | |||||||
| Trimethoprim/Sulfamethoxazole | 10 | 10 | 100% | |||||||
| Enterococcus ssp. (n = 17) | Benzylpenicillin | 17 | 17 | 100% | ||||||
| Ampicillin | 17 | 16 | 94.12% | 1 | 5.88% | |||||
| Ciprofloxacin | 17 | 16 | 94.12% | 1 | 5.88% | |||||
| Levofloxacin | 17 | 16 | 94.12% | 1 | 5.88% | |||||
| Rifampicin | 17 | 17 | 100% | |||||||
| Quinupristin-dalfopristin | 17 | 17 | 100% | |||||||
| Linezolid | 17 | 15 | 88.24% | 1 | 5.88% | 1 | 5.88% | |||
| Vancomycin | 17 | 15 | 88.24% | 1 | 5.88% | 1 | 5.88% | |||
| Tetracycline | 17 | 14 | 82.35% | 3 | 17.65% | |||||
| Nitrofurantoin | 17 | 15 | 88.24% | 1 | 5.88% | 1 | 5.88% | |||