10 mg/ml 5 mg/ml 2.5 mg/ml Ciprofloxacin
Staphylococcus aureus 10 9 8 40
Bacillus subtilis 8 7 6 23
Candida 9 7 5 N.A.
Pseudomonas aeruginosa 8 6 5 35
Escherichia coli 8 7 5 37
Table 2: Antimicrobial activity of ethanol root extract of Alstonia boonei