Table 1.
Minimal inhibitory concentration (MIC, µg·mL−1) of the Skeletonema species ethanol extracts measured after photo-illumination of bacterial planktonic cells with white light (total fluence of 25 J·cm−2), red light (total fluence of 37.5 J·cm−2) or in absence of illumination (control at dark). All experiments were performed in triplicate.
| S. marinoi | S. grethae | S. menzelii | S. subsalsum | |
|---|---|---|---|---|
| C. acnes | ||||
| Dark (control) | >1000 | >1000 | >1000 | >1000 |
| White light | 6 | 6 | 31 | 16 |
| Red light | 125 | 500 | >1000 | 1000 |
| S. aureus | ||||
| Dark (control) | 250 | 250 | >1000 | >1000 |
| White light | 63 | 31 | 250 | 125 |
| Red light | 125 | 125 | >1000 | >1000 |
| S. epidermidis | ||||
| Dark (control) | 250 | 250 | 250 | 250 |
| White light | 16 | 63 | 63 | 16 |
| Red light | 63 | 250 | 250 | 125 |