Table 1.
Minimum inhibitory concentration (MIC), minimum bactericidal concentration (MBC), and MBC/MIC ratios of Nepeta tenuifolia extract (%).
| Strain designation | MIC (%) | MBC (%) | MBC/MIC | Amp MIC (μg/ml) | Amp MBC (μg/ml) |
|---|---|---|---|---|---|
| Gram-positive bacteria | |||||
| Bacillus cereus (BCRC 10603) | 0.195 | 0.260 | 1.333 | 128 | 128 |
| Listeria monocytogenes (BCRC 14846) | 0.390 | 1.170 | 3.000 | 0.06 | 0.06 |
| Staphylococcus aureus subsp. aureus (BCRC 12657) | 0.780 | 2.350 | 3.013 | 0.06 | 0.12 |
| Staphylococcus aureus subsp. aureus (ATCC 29213) | 0.780 | 1.560 | 2.000 | 0.12 | 0.25 |
| Staphylococcus aureus subsp. aureus (ATCC 25923) | 1.560 | 4.690 | 3.006 | 0.06 | 0.12 |
| Gram-negative bacteria | |||||
| Citrobacter freundii (BCRC 12291) | 0.780 | 1.040 | 1.333 | 32 | 32 |
| Citrobacter freundii (BCRC 12292) | 0.390 | 0.390 | 1.000 | 64 | 64 |
| Escherichia coli (BCRC 10675) | 0.390 | 0.390 | 1.000 | 8 | 8 |
| Escherichia coli (ATCC 43890) | 0.097 | 0.097 | 1.000 | 8 | 8 |
| Salmonella enterica subsp. enterica (BCRC 10744) | 0.081 | 0.097 | 1.200 | 2 | 2 |
| Salmonella enterica subsp. enterica (BCRC 10747) | 0.780 | 0.780 | 1.000 | 4 | 4 |
| Pseudomonas aeruginosa (ATCC 15692) | 12.500 | >12.5 | NA | >128 | >128 |
| Pseudomonas aeruginosa (BCRC 10944) | 10.417 | 12.500 | 1.200 | >128 | >128 |
| Pseudomonas aeruginosa (ATCC 9027) | 5.210 | 5.210 | 1.000 | >128 | >128 |
| Pseudomonas aeruginosa (ATCC 27853) | 0.780 | 0.780 | 1.000 | >128 | >128 |
| Pseudomonas aeruginosa (BCRC 13053) | 6.250 | 8.333 | 1.333 | >128 | >128 |
NA: undetermined because MIC and/or MBC values were under the lower limit of each test range.