Table 4.
Minimal inhibitory concentration (MIC) of the studied spice extracts and CHL on the studied bacterial species.
| Tested samples and MIC in μg/ml in the absence and presence of PAßN (in parenthesis) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bacterial strains |
F. xanthoxyloides |
D. glomerata |
A. citratum |
B. cinnamomea |
E. giganteus |
M. whitei |
S. melongena |
O. subscorpioidea |
P. capense |
X. aethiopica |
S. zenkeri | CHL |
| E. coli | ||||||||||||
| ATCC8739 | - (1024) | 1024 (512) | 1024 (256) | - (256) | - (-) | - (1024) | - (128) | - (-) | - (512) | - (512) | - (-) | 4 (< 2) |
| ATCC10536 | 1024 | 512 (128) | 1024 | 1024 | 1024 | 1024 | - | 512 | 256 | 64 | 256 | < 2 (< 2) |
| AG100 | 256 | 512 (256) | 1024 (1024) | 1024 (1024) | 1024 (1024) | 1024 (-) | 1024 (-) | 512 (-) | - (1024) | 1024 (1024) | - (-) | 8 (< 2) |
| AG100A | 1024 | 1024 (256) | 1024 | 1024 | 1024 | - | - | 1024 | 1024 | - | - | < 2 (< 2) |
| AG100ATET | - | 1024 (512) | 1024 | 512 | 1024 | - | - | - | 1024 | 1024 | - | 64 (< 2) |
| AG102 | 1024 | 512 (256) | 1024 | 512 | 1024 | - | - | 1024 | 1024 | 1024 | - | 32 (< 2) |
| MC4100 | 256 | 256(< 8) | 512 | 256 | 512 | 1024 | 1024 | 1024 | 1024 | 1024 | - | 32 |
| W3110 | - (512) | 256 (< 8) | 512 (< 8) | 1024 (< 8) | 1024 (1024) | 1024 (512) | - | 512 (512) | 1024 (1024) | - (-) | - (-) | 4 (< 2) |
| E. aerogenes | - | |||||||||||
| ATCC13048 | - | 512 (512) | 1024 | 512 | - | - | - | - | - | - | - | 8 (< 2) |
| CM64 | - (-) | 512 (512) | - (1024) | 1024 (1024) | 1024 (1024) | 1024 (-) | - (-) | - (-) | - (-) | - (-) | - (-) | 256 (8) |
| EA3 | 1024 | 1024 (1024) | - | 1024 | - | - | - | 1024 | 1024 | - | - | - (128) |
| EA27 | 1024 | 512 (256) | 1024 | 1024 | 1024 | 1024 | - | 512 | 1024 | 1024 | - | 256 (< 2) |
| EA289 | - | 1024 (1024) | 1024 | 512 | 1024 | - | - | - | - | - | - | - (64) |
| EA298 | - | 1024 (128) | - | 1024 | - | 1024 | - | 256 | 512 | 1024 | 128 | 64 (< 2) |
| EA294 | 256 | 128 | 512 | 64 | 256 | - | 1024 | 256 | 256 | 256 | 512 | 8 |
| E. cloacae | ||||||||||||
| ECCI69 | 512 (-) | 1024 (1024) | 1024 (1024) | 1024 (512) | 1024 (-) | - (-) | - (-) | - (-) | - | -(1024) | - (256) | - (16) |
| BM47 | 1024 (1024) | 1024 (256) | 1024 (1024) | 1024 (1024) | 1024 (-) | - (-) | - (-) | - (-) | 512(64) | 1024(1024) | - (-) | - (< 2) |
| BM67 | 1024 (1024) | 1024 (128) | 1024 | 1024 | - | - | - | - | 512 | 1024 | - | 256 (16) |
| K. pneumoniae | ||||||||||||
| ATCC11296 | 1024 (1024) | 512 (128) | 512 (512) | 256 (256) | 1024 (256) | - (1024) | - (1024) | 1024 (512) | 1024 (256) | - (-) | - (-) | 4 (< 2) |
| KP55 | 1024 | 512 (256) | 1024 | 512 | - | - | - | 1024 | 1024 | - | - | 64 (2) |
| KP63 | 1024 | 512 (< 8) | 256 | 512 | 512 | 1024 | 512 | 256 | 256 | 64 | - | 64 (< 2) |
| K24 | 512 | 512 (32) | 512 | 256 | 32 | 1024 | 1024 | - | 1024 | - | - | 16 (< 2) |
| K2 | - | 1024 (128) | - | 1024 | - | - | - | 1024 | 512 | - | - | 32 (4) |
| P. stuartuii | ||||||||||||
| NEA16 | 1024 | 512 (32) | 128 | 256 | 1024 | 1024 | 1024 | 512 | 256 | 512 | 1024 | 32 (8) |
| ATCC29914 | 1024 | 1024 (512) | 512 | 512 | 1024 | 1024 | - | - | 1024 | - | - | 16 (8) |
| PS2636 | - | 512 | 1024 | 1024 | - | - | - | - | - | - | - | 32 |
| PS299645 | 1024 (-) | 256 (256) | 256 | 256 (512) | - (-) | - (-) | - (512) | - (-) | - (-) | - (-) | - (-) | 32 (< 2) |
| P. aeruginosa | ||||||||||||
| PA01 | - | 1024 (512) | 1024 | 1024 | - | - | - | - | - | 1024 | - | 16 (< 2) |
| PA124 | - | 512 (512) | - | 1024 | - | 1024 | - | - | - | - | - | 32 (< 2) |
(-): MIC not detected at up to 1024 μg/ml for the les extracts and 256 μg/ml for CHL. (): values in parenthesis are MIC of substance in the presence of PAßN at 30 μg/ml. The MIC of PAßN was 64 μg/ml on E. coli, AG100A, 512 μg/ml on ATCC11296, BM67, EA27, EA289; 1024 μg/ml on AG100ATET, ATCC13048, CM64; and > 1024 μg/ml on other bacteria. CHL: chloramphénicol