TABLE 2.
Isolates with discordant results between Etest and agar proportion method
| Isolate | Antibiotic | Proportion method resulta (initial/retest) | Etest result (MIC, in μg/ml) for initial testing/retesting | Status after retesting |
|---|---|---|---|---|
| 044EB | INH | R/R | S (0.016)/S (0.064) | Discordant |
| 032EB | INH | S/S | R (12.0)/R (48.0) | Discordant |
| 032EB | STR | S/S | R (128.0)/R (256.0) | Discordant |
| 015EB | STR | R/R | S (1.5)/ND | Discordant |
| 020EBS | STR | S/S | R (4.0)/R (96.0) | Discordant |
| 085VT | STR | S/S | R (4.0)/ND | Discordant |
| 091VT | STR | S/S | R (3.0)/ND | Discordant |
| 002EB | INH | S/ND | R (0.25)/S (0.016) | Concordant |
| 043EB | INH | S/R | R (32)/R (0.5) | Concordant |
| 090VT | INH | R/R | S (<0.016)/R (8) | Concordant |
| 19EB | STR | S/ND | R (4.0)/S (0.94) | Concordant |
| 090VT | STR | R/R | S (<0.016)/R (>256) | Concordant |
| 049EB | STR | S/R | R (6.0)/R (96) | Concordant |
| 03EBS | STR | S/R | R (8.0)/R (>256) | Concordant |
| 05EBS | STR | S/R | R (16)/R (>256) | Concordant |
| 06EBS | STR | R/R | S (0.016)/R (>256) | Concordant |
| 07EBS | STR | R/R | R (3.0)/S (0.125) | Concordant |
| 08EBS | STR | S/ND | R (3.0)/S (0.5) | Concordant |
| 092VT | STR | S/R | R (96)/R (96) | Concordant |
| 10EBS | EMB | S/R | R (>256)/R (>256) | Concordant |
| 132VT | EMB | R/R | S (0.125)/R (8) | Concordant |
| 034VT | EMB | S/R | R (>256)/R (8) | Concordant |
| 086VT | RIF | S/R | R (1.0)/R (1.5) | Concordant |
| 23EBS | RIF | S/R | R (32)/R (1.0) | Concordant |
a
R, resistant; S, sensitive; ND, not done (isolate was nonviable or contaminated at the time of retesting).