Table 2.
Median concentrations of bacterial growth inhibition (IC50s). IC50 values, coming from the interpolation of three independent experiments, are expressed in mM with a 95% confidence range (in brackets). Letters indicate the significant differences among different strains for each phytochemical, one-way ANOVA, Tukey’s multiple comparison test (p < 0.05).
| Bacterial Strain | IC50 | ||
|---|---|---|---|
| Eugenol | Capsaicin | Vanillin | |
| E. coli | 2.70 a,b (2.39–3.06) |
4.79 a,b (3.46–6.63) |
5.87 b,c (4.72–7.31) |
| P. aeruginosa | 2.19 a,b (1.76–2.72) |
1.21 a (0.92–1.60) |
9.23 c,d (6.99–12.20) |
| S. putrefaciens | 1.11 a (0.97–1.28) |
4.28 a,b (3.29–5.55) |
2.60 a,b (2.50–2.71) |
| S. aureus | 0.75 a (0.60–0.93) |
0.68 a (0.64–0.72) |
1.38 a (1.17–1.63) |
| L. plantarum | 25.20 c (24.01–26.45) |
>10 | 32.31 e (30.20–34.57) |
| B. thermosphacta | 5.02 b (4.65–5.42) |
7.77 b (7.18–8.39) |
11.38 d (10.46–12.37) |