Table 3.
Antimicrobial activities of vetiver EOs expressed as MICs on eight Gram-positive and 12 Gram-negative bacterial strains (µg/mL), and on two Candida species (µg/mL).
| Bacterial Strains Tested | Ve1501 | Ve1502 | Ve1503 |
|---|---|---|---|
| MICs (µg/mL) | |||
| Gram-negative bacteria | |||
| Acinetobacter baumannii RCH | >2000 | >2000 | >1000 |
| Acinetobacter baumannii SAN008 | >2000 | >2000 | >1000 |
| Acinetobacter baumannii AYE | >2000 | >2000 | >1000 |
| Escherichia coli ATCC25922 | >2000 | >2000 | >1000 |
| Escherichia coli BLSE 15509082801 | >2000 | >2000 | >1000 |
| Enterobacter aerogenes 15509970101 | >2000 | >2000 | >1000 |
| Enterobacter aerogenes 15501261101 | >2000 | >2000 | >1000 |
| Klebsiella pneumoniae BHR (OXA48) | >2000 | >2000 | >1000 |
| Klebsiella pneumoniae 15000077501 | >2000 | >2000 | >1000 |
| Pseudomonas aeruginosa ATCC27853 | >2000 | >2000 | >1000 |
| Pseudomonas aeruginosa 155089996501 | >2000 | >2000 | >1000 |
| Pseudomonas aeruginosa 15509942001 | >2000 | >2000 | >1000 |
| Gram-positive bacteria | |||
| SARM 15004850001 | 1000 | 2000 | ≤1000 |
| SARM 15004306601 | ≤500 | 2000 | ≤1000 |
| SASM 15509530101 | 1000 | 2000 | ≤1000 |
| SASM 15004159801 | ≤500 | 2000 | ≤1000 |
| SERM 15511909903 | 1000 | 2000 | ≤1000 |
| Corynebacterium striatum 12572545501 | ≤500 | 2000 | ≤1000 |
| Bacillus sp. 15003287301 | ≤500 | 2000 | ≤1000 |
| Bacillus subtilis 15000964701 | ≤500 | 2000 | ≤1000 |
| Fungal Strains Tested | MICs (µg/mL) | ||
|
Candida albicans ATCC66396 (Amphotericin B-MIC80: 0.125 µg/mL) |
800 | 800 | 200 |
|
Candida glabrata LMA901085 (Amphotericin B-MIC80: 0.5 µg/mL) |
400 | 200 | 100 |
SARM: Staphylococcus aureus resistant to methicillin; SASM: Staphylococcus aureus susceptible to methicillin; SERM: Staphylococcus epidermidis resistant to methicillin. Amphotericin: antifungal agent used as positive control.