Table 5.
Antimicrobial activity of EtOAc, hydroethanolic, and n-BuOH leaf extracts of A. arboreum against bacterial, fungal, and yeast strains by the disc method.
| Strains | Inhibition Zones Diameter (mm) a | |||
|---|---|---|---|---|
| Antibiotic/Antifungal | AcOEt Extract | EtOH-Eau (70/30) Extract | n-BuOH Extract | |
| Gram (+) bacterial strains b | ||||
| Micrococcus luteus LB141110 | 17 ± 0.3 | 16 ± 0.0 | 20 ± 0.8 | 19 ± 0.3 |
| Listeria ivanovii BUG 496 | 22 ± 0.3 | 17 ± 0.3 | 11 ± 0.3 | 16 ± 0.8 |
| Staphylococcus aureus ATCC 6538 | 27 ± 0.8 | 20 ± 0.3 | 20 ± 0.8 | 20 ± 0.3 |
| Gram (−) bacterial strains b | ||||
| Salmonella enterica CIP 8039 | 10 ± 0.3 | 20 ± 0.3 | 14 ± 0.3 | 15 ± 0.3 |
| Escherichia coli ATCC 8739 | 22 ± 0.3 | 16 ± 0.3 | 13 ± 0.3 | 16 ± 0.3 |
| Pseudomonas aeruginosa ATCC 9027 | 11 ± 0.8 | 20 ± 0.3 | 18 ± 0.3 | 16 ± 0.3 |
| Fungal strains c | ||||
| Aspergillus niger GCA_003615085 | NAd | NA | NA | NA |
| Fusarium oxysporum CBS 513.88 | 20 ± 0.3 | 21 ± 0.8 | 22 ± 0.3 | 20 ± 0.3 |
| Yeast strain c | ||||
| Candida albicans ATCC 90028 | 19 ± 0.3 | 20 ±0.3 | 20 ± 0.3 | 18 ± 0.2 |
Values are the mean of three experiments ± standard deviation (SD). (a) Diameter of the inhibition zones of extract, including the diameter of a well of 6 mm. (b) Ampicillin was used as a standard antibiotic at a concentration of 10 µg/well. (c) Amphotericin B was used as a standard fungicide and antiyeast at a concentration of 20 µg/well. (d) No activity.