Table 3 Antibacterial activity of root extract of S. heyneanus against selected bacterial strains. NA, no activity
Organism | Zone of inhibition (mm) | ||||
|---|---|---|---|---|---|
250 μg/mL | 375 μg/mL | 500 μg/mL | Standard (Tetracycline) | Negative control | |
Staphylococcus aureus | 12 | 15 | 18 | 25 | NA |
Bacillus subtilis | 14 | 16 | 20 | 30 | NA |
Salmonella typhi | 17 | 19 | 24 | 26 | NA |
Klebsiella pneumoniae | 15 | 17 | 22 | 18 | NA |