Table 2.
Antibiotic susceptibility of Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa as a planktonic population (MIC) and as a biofilm population (MBEC). Adapted from85–87.
| Microorganisms | Staphylococcus aureus | Escherichia coli | Pseudomonas aeruginosa | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Strain number | ATCC 2921385,86 ATCC 3555687 | ATCC 2592285 | ATCC 2785385 | ||||||
| Antimicrobial Agents | MIC | MBEC | Ratio | MIC | MBEC | Ratio | MIC | MBEC | Ratio |
| Oxacillin | 0.12–0.25 | >1024 | >1000 | ||||||
| Piperacillin | 1 – 4 | 32 | 8 – 32 | 2 – 16 | >1024 | >64 | |||
| Aztreonam | 2 – 4 | >1024 | >250 | ||||||
| Cefazolin | 0.5 | >1024 | >1000 | 1 – 4 | >1024 | >250 | |||
| Ceftazidime | 1 – 2 | >1024 | >500 | ||||||
| Imipenem | 1 – 4 | >1024 | >250 | ||||||
| Clindamycin | 0.12–0.25 | 128–256 | >1000 | ||||||
| >256(Ref87) | |||||||||
| Linezolid | 8 | >128(Ref86) | >16 | ||||||
| Rifampin | <0.02 | 4(Ref86) | 200 | ||||||
| Ciprofloxacin | 0.25–0.5 | 512 | >1000 | 0.004 – 0.008 | 8 | >1000 | 0.25 | 4 | 16 |
| Amikacin | 2 – 4 | 16 | 4 – 8 | ||||||
| Gentamicin | 0.5 | 2 | 4 | 2 – 4 | 16 | 4 – 8 | 2 – 4 | 128 | 32 – 64 |
| Tobramycin | 1 – 4 | 2 | 2 | 0.5 – 1 | 2 | 2 – 4 | |||
| Trimethoprim-sulfamethoxazole | |||||||||
| 1.14 – 2.28 | 608 – 1216 | >500 | |||||||
MIC, minimal inhibitory concentration; MBEC minimal biofilm eradication concentration. The unit of the values is μg/mL. Determination of MBEC were established using the MBEC device, formerly called Calgary device, according to the manufacturer’s protocol or with modification of the protocol.