Table 2.
Antimicrobial activity of tested essential oils and antibiotic ampicillin against Gram-negative and Gram-positive bacteria.
| Bacterium | Sample/Growth/MIC (μg∙mL−1) | |||||
|---|---|---|---|---|---|---|
| Houttuynia cordata | Persicaria odorata | Ampicillin | ||||
| Agar | Broth | Agar | Broth | Agar | Broth | |
| Gram negative | ||||||
| Escherichia coli | 1024 | 512 | 512 | 1024 | >4 | 0.50 |
| Pseudomonas aeruginosa | >1024 | >1024 | >1024 | 1024 | >4 | 1.00 |
| Klebsiella pneumoniae | >1024 | 1024 | >1024 | 1024 | >4 | >4.00 |
| Serratia marcescens | >1024 | 1024 | >1024 | >1024 | >4 | 4.00 |
| Gram positive | ||||||
| Staphylococcus aureus | >1024 | 1024 | >1024 | >1024 | >4 | 0.50 |
| Enterococcus faecalis | 1024 | 128 | >1024 | 512 | >4 | 0.25 |
| Streptococcus pyogenes | >1024 | 512 | 1024 | 512 | >4 | 1.00 |
| Bacillus subtilis | >1024 | >1024 | >1024 | 512 | >4 | 2.00 |