Table 2.
Effect of extracts of Allium cepa on the growth of microorganisms.
| Minimum Inhibitory Concentration MIC (µg/mL) | ||||||||
|---|---|---|---|---|---|---|---|---|
| E. coli | P. mirabilis | S. aureus | K. pneumoniae | P. aeruginosa | S. typhi | S. epidermidis | M. smegmatis | |
| MeAC | 500 | 500 | 250 | >500 | 250 | >500 | 500 | >500 |
| EtAC | >500 | >500 | 500 | 500 | 500 | >500 | 500 | 250 |
| HxAC | >500 | >500 | 500 | >500 | 500 | >500 | >500 | >500 |
| ChAC | >500 | >500 | >500 | >500 | 500 | >500 | 500 | >500 |
| MeACb | 500 | >500 | >500 | >500 | 500 | >500 | 500 | >500 |
| EaAC | >500 | 500 | >500 | >500 | >500 | >500 | 500 | >500 |
| AqAC | 250 | 500 | >500 | >500 | 500 | 500 | 500 | >500 |
| Ciprofloxacin | <0.49 | <0.49 | <0.49 | <0.49 | <0.49 | 7.81 | <0.49 | <0.49 |
| Amoxicillin | 15.6 | 62.5 | 62.5 | >500 | 62.5 | >500 | 7.81 | NT |
| Rifampicin | NT | NT | NT | NT | NT | NT | NT | 7.81 |
Key: NT = Not tested. Allium cepa var aggregatum extracts (Pink: MeAC-methanol, HxAC-hexane, ChAC-chloroform, EtAC-ethanol; White: AqAC-aqueous, MeACb-methanol, EaAC-ethanol). Extracts showing activity.