Table 2.
The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of hot water infusions against three strains of Streptococcus pyogenes. ATCC: American Type Culture Collection.
| Plant-Source, Plant Part | ATCC 19615 | ATCC 49399 | Clinical Isolate | ||||||
|---|---|---|---|---|---|---|---|---|---|
| MIC (mg/mL) | MBC (mg/mL) | MBC/MIC | MIC (mg/mL) | MBC (mg/mL) | MBC/MIC | MIC (mg/mL) | MBC (mg/mL) | MBC/MIC | |
| Clove FB | 12.50 | 25.00 | 2 | 12.50 | 25.00 | 2 | 12.50 | 25.0 | 2 |
| Sage L | 12.50 | 25.00 | 12.50 | 25.00 | 12.50 | 25.0 | |||
| Ginger-Canada Rh | 50.00 | >50.00 | - | 50.00 | >50.00 | - | NA | NA | - |
| Ginger-Chinese Rh | 50.00 | >50.00 | - | 50.00 | >50.00 | - | NA | NA | - |
| Oregano FB | 3.13 | 6.25 | 2 | 3.13 | 6.25 | 2 | 3.13 | 6.25 | 2 |
| Thyme FB | 3.13 | 6.25 | 2 | 3.13 | 6.25 | 2 | 3.13 | 6.25 | 2 |
| Licorice R | 1.56 | 3.13 | 2 | 1.56 | 3.13 | 4 | 3.13 | 6.25 | 2 |
| Barberry R | 3.13 | 6.25 | 2 | 3.13 | 6.25 | 2 | 3.13 | 6.25 | 2 |
| Echinacea L | 50.00 | >50.00 | - | 50.00 | >50.00 | - | NA | NA | - |
| Echinacea S | 6.25 | 12.50 | 2 | 6.25 | 12.50 | 2 | 6.25 | 12.50 | 2 |
| Echinacea F | 50.00 | >50.00 | - | 50.00 | >50.00 | - | 50.00 | >50.00 | - |
| Geranium L | 25.00 | 50.00 | 2 | 25.00 | 50.00 | 2 | NA | NA | - |
| Slippery elm IB | >50.00 | >50.00 | - | >50.00 | >50.00 | - | NA | NA | - |
| Olive L | >50.00 | >50.00 | - | >50.00 | >50.00 | - | NA | NA | - |
| Penicillin G | 0.0078 | 0.0156 | 2 | 0.0078 | 0.0156 | 2 | 0.0078 | 0.0156 | 2 |
FB: Flowering buds; F: Flowers; FS: Flowering shoots; Rh: Rhizome; R: Roots; IB: Inner bark; L: Leaves; NA: Not analyzed.