Table 2 Extract yields, Minimal Inhibitory Concentration (MIC) and Total Antibacterial Activity of the nine selected acetone leaf extracts against Gram-positive bacteria
Staphylococcus aureus | Enterococcus faecalis | Bacillus cereus | |||||
|---|---|---|---|---|---|---|---|
Plants | % yield | MIC (mg/ml) | TAA (ml/g) | MIC (mg/ml) | TAA (ml/g) | MIC (mg/ml) | TAA (ml/g) |
Hypericum roeperianum | 12.0 | 0.23 ± 0.11 | 521.59 | 0.32 ± 0.22 | 374.90 | 0.06 ± 0.03 | 1999.44 |
Cremaspora triflora | 2.02 | 0.02 ± 0.00 | 1008.33 | 0.12 ± 0.14 | 168.06 | 0.08 ± 0.00 | 252.08 |
Heteromorpha arborescens | 2.60 | 0.52 ± 0.15 | 50.06 | 0.42 ± 0.15 | 61.98 | 0.42 ± 0.15 | 61.98 |
Pittosporum viridiflorum | 2.72 | 0.08 ± 0.00 | 339.58 | 0.42 ± 0.15 | 64.68 | 0.21 ± 0.07 | 129.37 |
Bolusanthus speciosus | 2.30 | 0.45 ± 0.26 | 51.19 | 0.31 ± 0.00 | 74.30 | 0.11 ± 0.04 | 209.39 |
Calpurnia aurea | 2.86 | 0.12 ± 0.06 | 238.61 | 0.21 ± 0.07 | 136.35 | 0.11 ± 0.04 | 260.30 |
Maesa lanceolata | 11.12 | 0.06 ± 0.03 | 1853.89 | 0.13 ± 0.13 | 855.64 | 0.12 ± 0.14 | 926.94 |
Elaeodendron croceum | 9.00 | 0.23 ± 0.11 | 391.16 | 0.42 ± 0.15 | 214.21 | 0.21 ± 0.07 | 428.41 |
Morus mesozygia | 1.85 | 0.08 ± 0.00 | 230.83 | 0.16 ± 0.11 | 115.42 | 0.16 ± 0.11 | 115.42 |
Gentamicin | NA | 0.002 | NA | 0.0016 | NA | 0.0002 | NA |
Average for extracts | NA | 0.20 ± 0.17 | NA | 0.28 ± 0.12 | NA | 0.12 ± 0.04 | NA |