Table 2 Minimum inhibitory concentration (MIC) and total antibacterial activity (TAA) and selectivity index (SI) of the nine selected acetone leaf extracts against Proteus mirabilis, Enterobacter cloacae and Escherichia coli
| Â | Proteus mirabilis | Enterobacter cloacae | Escherichia coli | ||||||
|---|---|---|---|---|---|---|---|---|---|
Plants | MIC (mg/ml) | TAA (ml/g) | SI | MIC (mg/ml) | TAA (ml/g) | SI | MIC (mg/ml) | TAA (ml/g) | SI |
H. roeperianum | 0.63 | 190.4 | 0.11 | 0.31 | 387.0 | 0.21 | 0.08 | 1499.6 | 0.83 |
C. triflora | 0.63 | 32.0 | 0.09 | 0.08 | 252.1 | 0.72 | 0.08 | 252.1 | 0.72 |
H. arborescens | 0.31 | 84.0 | 0.26 | 0.16 | 162.7 | 0.51 | 0.08 | 325.4 | 1.01 |
P. viridiflorum | 0.31 | 87.6 | 0.18 | 0.16 | 169.8 | 0.34 | 0.08 | 339.6 | 0.68 |
B. speciosus | 0.63 | 36.6 | 0.08 | 0.08 | 287.9 | 0.66 | 0.08 | 287.9 | 0.66 |
C. aurea | 0.31 | 92.7 | 0.04 | 0.08 | 357.9 | 0.17 | 0.04 | 715.8 | 0.34 |
M. lanceolata | 0.02 | 5561.7 | 0.12 | 0.08 | 1390.4 | 0.03 | 0.16 | 695.2 | 0.01 |
E. croceum | 0.08 | 1124.6 | 0.07 | 0.08 | 1124.6 | 0.07 | 0.08 | 1124.6 | 0.07 |
M. mesozygia | 1.25 | 14.8 | 0.03 | 0.16 | 115.4 | 0.25 | 0.08 | 230.8 | 0.51 |
Mean | 0.46 | NA | NA | 0.13 | NA | NA | 0.08 | NA | NA |
SD | 0.35 | NA | NA | 0.07 | NA | NA | 0.03 | NA | NA |
Gentamicin | 0.0008 | NA | NA | 0.0002 | NA | NA | 0.006 | NA | NA |