Table 2.
The inhibition zone diameter (in mm) of pyranocycloartobiloxanthone A (1), dihydroartoindonesianin C (2) and pyranocycloartobiloxanthone B (3) against pathogenic microbes.
| Microorganisms | Inhibition zone diameter (in mm) | |||||
|---|---|---|---|---|---|---|
| (1) | (2) | (3) | Gentamicin sulfate | Streptomycin sulfate | Nystatin | |
| Bacteria | ||||||
| Reference strains | ||||||
| Bacillus subtilis ATCC6633 | 8 | - | - | 15 | nt | |
| Escherichia coli ATCC25922 | 7 | - | - | 25 | nt | |
| Micrococcus luteus ATCC10240 | - | - | - | nt | nt | |
| Methicillin resistant Staphylococcus aureus ATCC33591 | 20 | - | - | nt | 20 | |
| Pseudomonas aeruginosa JCM2412 | - | nt | nt | 15 | 21 | |
| Staphylococcus aureus ATCC6538 | 9 | - | - | 11 | nt | |
| Salmonella typhimurium S865B (IMR culture) | 9 | - | - | nt | nt | |
| Clinically isolated strain Bacillus subtilis |
12 | nt | nt | nt | - | |
| Fungi | ||||||
| Reference strains | ||||||
| Aspergillus niger ATCC16404 | - | - | - | nt | ||
| Candida albican ATCC1023 | 7 | - | - | 15 | ||
| Saccharomyces cerevisiae S617 (IMR culture) | 8 | - | - | 23 | ||
Note: (-) – not active, (nt) – not tested. Streptomycin sulfate 10 μg/disc, gentamicin sulfate 10 μg/disc, nystatin 100 IU/disc; pyranocycloartobiloxanthone A (1), dihydroartoindonesianin C (2), pyranocycloartobiloxanthone B (3).