Table 5.
Minimum inhibitory concentration (MIC) of ethanol extracts of the investigated plants.
| Plant test organism | Minimum inhibitory concentration (µg/ml) |
|||||||
|---|---|---|---|---|---|---|---|---|
| Calendula triptero-carpa | Centarea sinaica | Centarea pseudo-sinaica | Koelpinia linearis | Plectran-thus arabicus | Plectran-thus asirensis | Tripleuro-spermum auriculatum | Standard antibiotic | |
|
Bacteria Gram negative |
Gentamycin | |||||||
| Escherichia coli | 3.9 | 31.25 | 3.9 | 62.5 | 3.9 | 15.63 | 62.5 | 0.24 |
| Klebsiella pneumoniae | 125 | 3.9 | 62.5 | 250 | 0.48 | 0.97 | 125 | 0.12 |
| Proteous vulgaris | 250 | 15.63 | 31.25 | 500 | 7.81 | 7.81 | 31.25 | 0.24 |
| Pseudomonas aeruginosa | 15.63 | 31.25 | 31.25 | 500 | 15.63 | 1000 | 15.63 | 1.95 |
| Salmonella typhimurium | 250 | 250 | 1000 | 125 | 15.63 | 62.5 | 125 | 0.24 |
| Gram positive | Ampicillin | |||||||
| Bacillus subtilis | 62.5 | 15.63 | 0.03 | 31.25 | 0.48 | 0.97 | 0.03 | 0.007 |
| Staphylococcus epidermidis | 31.25 | 15.63 | 3.9 | 3.9 | 0.98 | 3.9 | 31.25 | 0.24 |
| Streptococcus mutans | 0.98 | 15.63 | 1.95 | 1.95 | 0.98 | 0.98 | 31.25 | 0.24 |
| Streptococcus pneumoniae | 500 | 31.25 | 7.81 | 125 | 7.81 | 7.81 | 7.81 | 0.98 |
| Streptococcus pyogenes | 62.5 | 31.25 | 0.03 | 3.9 | 1.95 | 3.9 | 7.8 | 0.24 |
| Fungi | Amphotericin B | |||||||
| Aspergillus fumigatus | 15.63 | 15.63 | 1.95 | 62.5 | 3.9 | 3.9 | 1.95 | 0.98 |
| Candida albicans | 62.5 | 31.25 | 1.95 | 250 | 1.95 | 3.9 | 0.98 | 0.48 |
| Candida tropicalis | 1.95 | 3.9 | 0.98 | 31.25 | 1.95 | 15.63 | 0.98 | 0.24 |
| Geotricum candidum | 7.8 | 7.8 | 0.98 | 15.63 | 0.98 | 1.95 | 0.24 | 0.03 |
| Syncephalastrum racemosum | 250 | 62.5 | 31.25 | 62.5 | 62.5 | 125 | 15.63 | 7.8 |