Table 1.
Minimum inhibitory concentration (MIC) of Ag-NPs and ciprofloxacin and minimum bactericidal concentration (MBC) of Ag-NPs for different bacterial species.
| Bacterial strain | Ag-NPs | Ciprofloxacin | ||
|---|---|---|---|---|
| MIC (pM) | MBC (pM) | MBC/MIC | MIC (μM) | |
| Gram-positive bacteria | ||||
| S. aureus ATCC 29213 | 0.8 | 0.8 | 1.0 | 1.6 |
| MSSA clinical strain 1 | 0.8 | 0.8 | 1.0 | 0.8 |
| MSSA clinical strain 2 | 0.4 | 0.4 | 1.0 | 0.8 |
| MSSA clinical strain 3 | 0.4 | 0.8 | 2.0 | 0.4 |
| MRSA clinical strain | 3.2 | 3.2 | 1.0 | 99.1 |
| S. epidermidis ATCC 12228 | 3.2 | 6.2 | 1.9 | 3.1 |
| E. faecalis ATCC 29212 | 0.8 | 0.8 | 1.0 | 0.8 |
| Gram-negative bacteria | ||||
| P. mirabilis clinical strain | 0.4 | 0.4 | 1.0 | 0.4 |
| A. baumannii clinical strain | 0.8 | 0.8 | 1.0 | 1.6 |
| E. coli ATCC 25922 | 1.6 | 3.2 | 2.0 | 0.4 |
| E. coli clinical strain 1 | 1.6 | 1.6 | 1.0 | 0.8 |
| E. coli clinical strain 2 | 3.2 | 3.2 | 1.0 | 1.0 |
| P. aeruginosa ATCC 27853 | 6.4 | 6.4 | 1.0 | 3.1 |
| K. pneumoniae ATCC 700603 | 0.8 | 1.6 | 2.0 | 0.4 |
MSSA: methicillin-sensitive S. aureus; MRSA: methicillin-resistant S. aureus.