Table 2.
Zone of inhibitory activity of the fruit pulp extracts of T. indica against pathogenic bacteria as compared to the tetracycline drug (positive control) and Tween 20 (negative control)
| Extract | Concentration (mg/mL) | Diameter zone of inhibition (ZI) (mm) | |||
|---|---|---|---|---|---|
| Tested bacteria | |||||
| S. aureus | K. pneumonia | ||||
| Mean ± SD | P-value | Mean ± SD | P-value | ||
| Tetracycline | 0.025 | 16.00 ± 0.33a | 16.00 ± 0.57a | ||
| Acetone | 100 | 13.00 ± 0.57b | 0.00 | 14.33 ± 0.67a | 0.81 |
| 200 | 16.33 ± 0.33a | 0.79 | 17.33 ± 1.40a | 0.90 | |
| 300 | 17.00 ± 0.57a | 0.24 | 18.67 ± 1.76a | 0.46 | |
| Tetracycline | 0.025 | 16.00 ± 0.57a | 16.00 ± 0.33a | ||
| Ethanol | 100 | 13.33 ± 0.88a | 0.24 | 13.67 ± 0.33b | 0.00 |
| 200 | 14. 67 ± 1.20a | 0.79 | 15.33 ± 0.33a | 0.06 | |
| 300 | 16.00 ± 1.00a | 1.00 | 17.67 ± 0.33a | 0.20 | |
Key: S. aureus (Staphylococcus aureus (ATCC 25923)), K. pneumonia (Klebseilla pneumonia (ATCC 700603)); ˗, +, ++, +++, and ++++ shows the extract used could have no effect, weak effect, moderate effect, strong effect, and very strong effect on the growth of the selected organisms respectively. Mean values with different superscripts in the same column are significantly different