Table 1.
Minimal inhibitory concentration (MIC) and minimal bactericidal concentration (MBC) in μg/mL of crude leaf and bark extracts, isolated compounds and chloramphenicol against reference strains and MDR Gram-negative bacteria.
| Bacterial strains | Tested samples, MIC and MBC (in bracket) values (µg/mL) | ||
|---|---|---|---|
| Leaf extract (APL) | Bark extract (APB) | Chloramphenicol | |
| Escherichia coli | |||
| ATCC8739 | 1024 (-) | 512 (-) | 2 (64) |
| AG102 | 512 (-) | - | 32 (256) |
| AG100Atet | 512 (-) | - | 32 (256) |
| ATCC10536 | 1024 (-) | - | 2 (32) |
| Enterobacter aerogenes | |||
| ATCC13048 | 256 (-) | 8 (-) | 16 (128) |
| CM64 | - | - | 256 (-) |
| EA27 | 1024 (-) | 256 (-) | 32 (256) |
| EA289 | - | - | 32 (256) |
| Klebsiella pneumoniae | |||
| ATCC11296 | 1024 (-) | - | 32 (256) |
| KP55 | - | 128 (-) | 64 (256) |
| KP63 | - | - | 32 (256) |
| Pseudomonas aeruginosa | |||
| PA01 | 64 (-) | 256 (-) | 64 (-) |
| PA124 | 256 (-) | 512 (-) | 256 (-) |
| Providencia stuartii | |||
| NEA16 | 1024 (-) | - | 64 (256) |
| ATCC29916 | 8 (-) | 256 (-) | 64 (256) |
(-): MIC or MBC value > 1024 µg/mL for APL and APB or >256 for chloramphenicol; MIC values in bold: significant antibacterial effect [18].