Table 3.

Antibiotic susceptibility of P. aeruginosaATCC 27853 as a planktonic population (MIC) and as a biofilm population (MBEC) as derived by the NCCLS assay and an assay with the CBD

AntibioticMIC (μg/ml)MBEC (μg/ml)
NCCLS assayaAssay with CBDaA650a0 CFU/pegb
Amikacin241616
Aztreonam24>1,024>1,024
Ceftazidime12>1,024>1,024
Ciprofloxacin0.250.2544
Gentamicin24128128
Imipenem14>1,024>1,024
Piperacillin216>1,024>1,024
Tobramycin0.5122
  • 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.