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

AntibioticMIC (μg/ml)MBEC (μg/ml)
NCCLS assayaAssay with CBDaA650a0 CFU/pegb
Cefazolin0.50.5>1,024>1,024
Ciprofloxacin0.250.5512512
Clindamycin0.120.25128256
Gentamicin0.50.522
Oxacillin0.120.25>1,024>1,024
Penicillin14128128
Vancomycin11>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.