Table 1.
Minimum inhibitory concentration (MIC in µg/mL) values of hydro-ethanolic extracts from selected medicinal plants.
| Plant species/family/voucher specimen number | Part used | M. smegmatis | M. tb; strain H37Ra | M. tb H37Rv |
|---|---|---|---|---|
| Solanum torvum SW./ Solanaceae/JM01 | Leaves | 2500 | 156.3 | 1250 |
| Zingiber officinale roscoe/Zingiberaceae/JM02 | Rhizomes | 10,000 | 2500 | 10,000 |
| Aloe vera var. barbadensis/Xanthorrhoeaceae/JM03 | Leaves | 10,000 | 2500 | 5000 |
| Dissotis rotundifolia (Sm.) Triana/Melastomataceae/JM04 | Leaves | 10,000 | >10,000 | 5000 |
| Chenopodium ambrosioides L./Amaranthaceae/JM05 | Leaves | 10,000 | 5000 | >10,000 |
| Isoniazid (INH) | – | 2 | 0.08 | 0.03 |
| Rifampicin (RIF) | – | 4 | 0.08 | 0.08 |
| Ethambutol (EMB) | – | 0.06 | 0.50 | 2 |
Experiments were carried out in triplicate and results are expressed as means of three replicate experiments. All the crude extracts were dissolved in distilled water. Essential anti-tb drugs were prepared according to manufacturer’s instructions. Tested concentration range for crude extracts: 19.5–10,000 µg/mL; tested concentration range for positive control drugs: INH: 0.025–1.6 µg/mL; RIF: 0.25–16 µg/mL; EMB: 0.25–16 µg/mL. (-): pure compounds tested.