Table 1.
Extract yield, Minimal Inhibitory Concentration (MIC) with standard deviation and Total Antibacterial Activity (TAA) of the nine selected acetone leaf extracts against Gram-negative test bacteria
| Escherichia coli | Salmonella Typhimurium | Pseudomonas aeruginosa | |||||
|---|---|---|---|---|---|---|---|
| Plants | % yield | MIC (mg/ml) | TAA (ml/g) | MIC (mg/ml) | TAA (ml/g) | MIC (mg/ml) | TAA (ml/g) |
| Hypericum roeperianum | 12.0 | 0.13 ± 0.04 | 922.82 | 0.26 ± 0.07 | 461.41 | 0.08 | 1499.58 |
| Cremaspora triflora | 2.02 | 0.05 ± 0.02 | 403.33 | 0.32 ± 0.25 | 63.02 | 0.16 | 126.04 |
| Heteromorpha arborescens | 2.60 | 0.18 ± 0.10 | 144.63 | 0.31 ± 0.00 | 83.98 | 0.16 | 162.71 |
| Pittosporum viridiflorum | 2.72 | 0.11 ± 0.04 | 246.97 | 0.22 ± 0.13 | 123.48 | 0.16 | 169.79 |
| Bolusanthus speciosus | 2.30 | 0.08 ± 0.00 | 287.92 | 0.13 ± 0.04 | 177.18 | 0.16 | 143.96 |
| Calpurnia aurea | 2.86 | 0.04 ± 0.00 | 715.83 | 0.13 ± 0.04 | 220.26 | 0.16 | 178.96 |
| Maesa lanceolata | 11.12 | 0.04 ± 0.00 | 2780.83 | 0.16 ± 0.00 | 695.21 | 0.08 | 1390.42 |
| Elaeodendron croceum | 9.00 | 0.11 ± 0.04 | 817.88 | 0.26 ± 0.07 | 346.03 | 0.08 | 1124.58 |
| Morus mesozygia | 1.85 | 0.07 ± 0.02 | 263.81 | 0.16 ± 0.11 | 115.42 | 0.08 | 230.83 |
| Gentamicin | NA | 0.0008 | NA | 0.0002 | NA | 0.0002 | NA |
| Average for extracts | NA | 0.09 ± 0.04 | NA | 0.22 ± 0.07 | NA | 0.12 ± 0.04 | NA |
NA not applicable