TABLE 4.
Antibiotic susceptibility of S. aureus ATCC 29213 as a planktonic population (MIC) and as a biofilm population (MBEC) derived by the NCCLS assay and an assay with the CBD
| Antibiotic | MIC (μg/ml)
|
MBEC (μg/ml)
|
||
|---|---|---|---|---|
| NCCLS assaya | Assay with CBDa | A650a | 0 CFU/pegb | |
| Cefazolin | 0.5 | 0.5 | >1,024 | >1,024 |
| Ciprofloxacin | 0.25 | 0.5 | 512 | 512 |
| Clindamycin | 0.12 | 0.25 | 128 | 256 |
| Gentamicin | 0.5 | 0.5 | 2 | 2 |
| Oxacillin | 0.12 | 0.25 | >1,024 | >1,024 |
| Penicillin | 1 | 4 | 128 | 128 |
| Vancomycin | 1 | 1 | >1,024 | >1,024 |
a
The values were obtained by measuring the turbidity at 650 nm (A650) on a 96-well plate reader.
b
The values were obtained by determination of plate counts.