Table 4.
Inhibitory activity of the extracts on the metabolism of the bacterial sessile cell in the mature biofilm (24 h).
| Percentage of Inhibition Compared to the Control | ||||
|---|---|---|---|---|
| MTT (24 h) |
P. incisa (Ext. H2O) 10 μg/mL |
P. incisa (Ext. H2O) 20 μg/mL | P. incisa (Ext. MeOH) 10 μg/mL |
P. incisa (Ext. MeOH) 20 μg/mL |
| A. baumannii | 0.00 ± 0.00 | 0.00 ± 0.00 | 0.00 ± 0.00 | 0.00 ± 0.00 |
| E. coli | 0.00 ± 0.00 | 0.00 ± 0.00 | 0.00 ± 0.00 | 0.00 ± 0.00 |
| L. monocytogenes | 0.00 ± 0.00 | 0.00 ± 0.00 | 0.00 ± 0.00 | 0.00 ± 0.00 |
| P. aeruginosa | 0.00 ± 0.00 | 19.98 **** ± 0.00 | 0.00 ± 0.00 | 0.00 ± 0.00 |
| S. aureus | 49.77 **** ± 3.88 | 77.94 **** ± 4.06 | 12.74 **** ± 1.02 | 30.52 **** ± 2.84 |
The tests were performed using 10 and 20 μg/mL of extract. All tests were performed in triplicate. Results are expressed as inhibition percentages (means ± SD) and were calculated assuming the control (untreated bacteria) = zero. ****: p < 0.0001, compared with the control (ANOVA followed by Dunnett’s multiple comparisons test).