Table 2.
Antibacterial Susceptibility of the X. tongaense secondary metabolites from ethyl acetate crude extract.
| Bacterial pathogens | Concentration 100 μg/mL | |||||
|---|---|---|---|---|---|---|
| MRSA (ATCC 43300) | MRSA (ATCC 700699) | S. aureus (ATCC 25923) | S. aureus (MTCC 3160) | VRE (ATCC 56299) | E. faecalis | |
| Hexane | 16.2 ± 0.05** | 15 ± 0.1** | 17.2 ± 0.07** | 18 ± 0.05** | 18.5 ± 0.1** | 20 ± 0.1** |
| DCM | 15 ± 0.07** | 16 ± 0.05** | 18.5 ± 0.05** | 18 ± 0.1* | 12.6 ± 0.05** | 14 ± 0.05** |
| Ethyl acetate | 20 ± 0.25** | 24 ± 0.14** | 20 ± 0.27** | 22 ± 0.47** | 18 ± 0.23** | 21 ± 0.11** |
| Butanol | 15 ± 0.05** | 16 ± 0.05* | 21 ± 0.05* | 19 ± 0.05* | 17 ± 0.05** | 19 ± 0.05* |
| Oxacillin | 10 ± 0.4** | 12 ± 0.2* | 17 ± 0.1* | 18.3 ± 0.25* | 11 ± 0.25** | 15 ± 0.1* |
| Vancomycin | – | – | – | 17 ± 0.05* | 11 ± 0.03* | 14 ± 0.05* |
Values expressed as ZOI (mm) ± SD of Crude extract (n = 3). “*” indicates significant differences (*p < 0.05; **p < 0.01) from the control. Positive control-Oxacillin (1 mcg/disc), Vancomycin (30 mcg/disc); Negative control-DMSO (5%); “–” denotes no antibacterial activity.