Table 4.
Comparison of mean inhibition zone of ethanol, methanol, and n-hexane solvent extracts of B. polystachiya against test bacteria.
| Test organism | solvents | Mean IZ(mm) ±SD | Positive and negative controls |
|
|---|---|---|---|---|
| Gentamycin | DEMO | |||
| S.aureus(ATTC 43300) | Ethanol | (20.33 ± 1.52)a | (20.67 ± 3.51)a | 0.00 ± 0.00 |
| Methanol | (20.67 ± 2.08)a | (20.67 ± 3.51)a | 0.00 ± 0.00 | |
| n-hexane | (18.00 ± 2.64)a | (20.67 ± 3.51)a | 0.00 ± 0.00 | |
| S.aureus(clinical isolate) | Ethanol | (16.67 ± 3.05)b | (16.33 ± 1.52)b | 0.00 ± 0.00 |
| Methanol | (14.67 ± 1.52)b | (16.33 ± 1.52)b | 0.00 ± 0.00 | |
| n-hexane | (0.00 ± 0.00)c | (16.33 ± 1.52)b | 0.00 ± 0.00 | |
| E.coli(ATTC 35218) | Ethanol | (0.00 ± 0.00)c | (18.67 ± 3.05)a | 0.00 ± 0.00 |
| Methanol | (5.67 ± 0.57)bc | (18.67 ± 3.05)a | 0.00 ± 0.00 | |
| n-hexane | (0.00 ± 0.00)c | (18.67 ± 3.05)a | 0.00 ± 0.00 | |
| E.coli(clinical isolate) | Ethanol | (0.00 ± 0.00) | (15.00 ± 1.73)b | 0.00 ± 0.00 |
| Methanol | (0.00 ± 0.00) | (15.00 ± 1.73)b | 0.00 ± 0.00 | |
| n-hexane | (0.00 ± 0.00) | (15.00 ± 1.73)b | 0.00 ± 0.00 | |
| P.aeruginosa(ATTC 27853) | Ethanol | (0.00 ± 0.00) | (20.67 ± 1.52)a | 0.00 ± 0.00 |
| Methanol | (0.00 ± 0.00) | (20.67 ± 1.52)a | 0.00 ± 0.00 | |
| n-hexane | (0.00 ± 0.00) | (20.67 ± 1.52)a | 0.00 ± 0.00 | |
| S.typhimurium(ATTC 1333) | Ethanol | (18.67 ± 2.52)d | (22.33 ± 0.57)a | 0.00 ± 0.00 |
| Methanol | (29.00 ± 2.64)e | (22.33 ± 0.57)a | 0.00 ± 0.00 | |
| n-hexane | (10.00 ± 2.00)f | (22.33 ± 0.57)a | 0.00 ± 0.00 | |
*Values were means of triplicate determinations. Values of the same column followed by different letters are significantly different at (p ≤ 0.05). Where “IZ: Inhibition zone, SD: Standard deviation”.