Table 3.
Minimum inhibitory and bacteriostatic concentrationsa
| Extract |
E. coli |
B. subtilis |
M. mycoides capri |
|||
|---|---|---|---|---|---|---|
| MIC (mg/mL) | MBCb(mg/mL) | MIC (mg/mL) | MBCb(mg/mL) | MIC (mg/mL) | MBCb(mg/mL) | |
| Astragalus-Aq |
>10 |
N/A |
>10 |
N/A |
>10 |
N/A |
| Astragalus-ETOH |
>10 |
N/A |
0.001 |
0.001 |
1.0 |
BC |
| Astragalus-Com |
>50 |
N/A |
>50 |
N/A |
>50 |
N/A |
| Goldenseal-Aq |
>10 |
N/A |
>10 |
N/A |
0.05 |
0.5 |
| Goldenseal-ETOH |
1.0 |
1.0 |
1.0 |
BC |
1.0 |
1.0 |
| Goldenseal-Comc |
0.1 |
BC |
>1 |
N/A |
>1 |
N/A |
| Elderberry-G |
0.0038 |
0.0038 |
3.8 |
3.8 |
0.38 |
0.38 |
| Elderberry-365 |
0.1 |
BC |
>10 |
N/A |
0.001 |
BC |
| Oregano-LE |
0.033 |
BC |
0.00033 |
BC |
0.033 |
BC |
| Oregano oil |
0.167 |
BC |
0.0167 |
BC |
0.092 |
0.167 |
| Thyme |
1.0 |
BC |
>100 |
N/A |
0.5 |
BC |
| Calendula |
>95 |
N/A |
>95 |
N/A |
>95 |
N/A |
| Colloidal silver |
>0.003 |
N/A |
0.0003 |
0.0003 |
>0.003 |
N/A |
| Water |
NI |
N/A |
NI |
N/A |
NI |
N/A |
| 95 % Ethanol |
NI |
N/A |
NI |
N/A |
NI |
N/A |
| Olive oil | NI | N/A | NI | N/A | NI | N/A |
aN = 3 replicates; MIC/MBC concentrations reflect mean values across trials. Abbreviations: N/A (not applicable); BC (bactericidal); NI (no inhibition by solvents at the lowest dilution [1:10]). Efficacious compounds with a measureable inhibitory concentration or bactericidal activity are bolded.
bColumns marked N/A or BC indicate that MBCs could not be determined due to lack of inhibition (N/A) or bactericidal activity (BC).
cConcentration reflects total alkaloid content.