TABLE 1.
Comparison of the MICs for five strains of GNB determined by the impedance method and the broth microdilution method
| Microorganism | MICa (μg/ml)
|
|
|---|---|---|
| First antibiotic | Second antibiotic | |
| E. coli ATCC 23501 | 0.5, 0.25 (gentamicin) | 8, 8 (cephalothin) |
| P. aeruginosa ATCC 27853 | 0.25, 0.25 (gentamicin) | 0.5, 1 (amikacin) |
| K. pneumoniae 9367 | 0.5, 0.5 (gentamicin) | 0.032, 0.032 (ciprofloxacin) |
| E. cloacae 9950 | >512, >512 (cephalothin) | 0.5, 1 (amikacin) |
| C. freundii 8311 | 1, 2 (amikacin) | 1, 1 (ciprofloxacin) |
a
Each strain was tested against two randomly selected antimicrobial agents. The first MIC in each pair was determined by the broth microdilution method, while the second MIC was determined by the impedance method.