Table 3.
Lag phase and growth rate of the growth curves of survival on hydroxyapatite bone cement containing organic nanoparticles
| Concentration of nanoparticles (% w/w) | λ (hour) | Growth rate (hour−1) |
|---|---|---|
| S. aureus | ||
| 0 | 0.11±0.02 | 0.15±0.02 |
| 0.1 | 0.13±0.02 | 0.16±0.03 |
| 0.5 | 2.11±0.08 | 0.12±0.03 |
| 1 | 3.81±0.36 | 0.06±0.02 |
| 5 | >24 | No growth |
| MRSA | ||
| 0 | 1.25±0.22 | 0.27±0.03 |
| 0.1 | 1.44±0.26 | 0.31±0.05 |
| 0.5 | 2.25±0.35 | 0.31±0.04 |
| 1 | 10.02±0.73 | 0.26±0.07 |
| 5 | >24 | No growth |
| A. baumannii | ||
| 0 | 2.29±0.36 | 0.22±0.01 |
| 0.1 | 2.34±0.43 | 0.18±0.02 |
| 0.5 | 1.78±0.13 | 0.20±0.02 |
| 1 | >24 | No growth |
| 5 | >24 | No growth |
| S. epidermidis | ||
| 0 | 1.60±1.24 | 0.17±0.00 |
| 0.1 | 1.23±0.55 | 0.14±0.01 |
| 0.5 | 2.12±0.25 | 0.14±0.02 |
| 1 | 8.45±1.27 | 2.42±5.22 |
| 5 | >24 | No growth |
Note: Mean ± standard deviation.
Abbreviations: MRSA, methicillin-resistant Staphylococcus aureus; S. aureus, Staphylococcus aureus; A. baumannii, Acinetobacter baumannii; S. epidermidis, Staphylococcus epidermidis.