TABLE 1.
Test reproducibility: within method agreement for MIC test strip and Etest MIC values between two repeats for clinical and reference isolates
Isolate type | No. of isolates tested in duplicates | Gradient MIC range (mg/liter) | No. (%) of isolates with MIC difference between replicates of: |
||
---|---|---|---|---|---|
±1 Log2 dilution | ±2 Log2 dilution | ±>2 Log2 dilution | |||
MIC test strip | |||||
Clinical | 107 | 0.06 to 16.0 | 92 (86) | 14 | 1 |
Reference | 9 | 0.5 to >256 | 9 (100) | 0 | 0 |
Etest | |||||
Clinical | 107 | 0.06 to 8 | 107 (100) | 0 | 0 |
Reference | 9 | 0.5 to >256 | 9 (100) | 0 | 0 |