Table 3.
Minimum inhibitory concentration (MIC) of the bioactive compounds produced by Rhodococcus sp. VLD10
| Test organism | MIC (µg/ml) | ||||||
|---|---|---|---|---|---|---|---|
| D1Ba | D1Bb | D2Ba | D2Bb | D3 | Crude extract |
Positive control | |
| Bacteria | |||||||
| Bacillus cereus | 20 | 40 | 35 | 35 | 20 | 10 | 15 |
| Bacillus megaterium | 45 | 35 | 45 | 55 | 20 | 15 | 25 |
| Bacillus subtilis | 35 | 20 | 20 | 20 | 15 | 10 | 20 |
| Corynebacterium diphtheriae | 30 | 45 | 55 | 55 | 20 | 10 | 30 |
| Escherichia coli | 30 | 35 | 45 | 35 | 25 | 10 | 20 |
| Pseudomonas aeruginosa | 40 | 45 | 35 | 40 | 45 | 10 | 40 |
| Salmonella typhi | 50 | 50 | 45 | 45 | 50 | 20 | 45 |
| Serratia marcescens | 30 | 35 | 30 | 35 | 25 | 10 | 25 |
| Shigella flexneri | 35 | 20 | 20 | 15 | 25 | 15 | 15 |
| Staphylococcus aureus | 25 | 25 | 15 | 15 | 30 | 10 | 20 |
| Xanthomonas campestris | 25 | 35 | 25 | 20 | 25 | 10 | 25 |
| Fungi | |||||||
| Aspergillus niger | 50 | 85 | 95 | 70 | 50 | 20 | 5 |
| Botrytis cinerea | 25 | 80 | 90 | 75 | 45 | 15 | 10 |
| Candida albicans | 55 | 95 | 100 | 90 | 40 | 15 | 10 |
| Fusarium oxysporum | 50 | 80 | 70 | 65 | 35 | 20 | 10 |
| Fusarium solani | 35 | 100 | 80 | 65 | 40 | 20 | 10 |
| Verticillium alboatrum | 80 | 90 | 80 | 70 | 55 | 20 | 10 |
| Alternaria alternata | 65 | 75 | 75 | 85 | 40 | 20 | 5 |
Tetracylcline is the positive control for bacteria and Nystatin for fungi
5D1Ba benzoic acid, D2Ba 4-chlorobenzaldehyde, D1Bb 2-nitrobenzaldehyde, D2Bb nonadeconoic acid, D3 3-isopropylhexahydro-1H-pyrido[1,2-a] pyrazine-1,4(6H)-dione