Table 2.
Selected EO and their fractions with yield results, MIC and MBC values, and MBC : MIC ratio.
| Essential oil | Fraction | ||||||
|---|---|---|---|---|---|---|---|
| Identification | MIC (μg/mL) | MBC (μg/mL) | Identification | Yield (%) | MIC (μg/mL) | MBC (μg/mL) | MBC : MIC ratio1 |
| Aloysia gratissima (Ag) | 125–250 | 250–500 | Ag1 | 28.9 | 250–500 | 500–1000 | 2 : 1 |
| Ag2 | 17.9 | 250–500 | 500–1000 | 2 : 1 | |||
| Ag3 | 20.1 | 62.5–125 | 500–1000 | 8 : 1 | |||
| Ag4 2 | 14.4 | 31.2–62.5 | 62.5–125 | 2 : 1 | |||
| Baccharis dracunculifolia (Bd) | 62.5–125 | 250–500 | Bd1 | 30.5 | 250–500 | 500–1000 | 2 : 1 |
| Bd2 | 22.1 | 15.6–31.2 | 125–250 | 8 : 1 | |||
| Coriandrum sativum (Cs) | 31.2–62.5 | 62.5–125 | Cs1 | 6.6 | 125–250 | 500–1000 | 4 : 1 |
| Cs2 | 4.9 | 125–250 | 250–500 | 2 : 1 | |||
| Cs3 | 12.7 | 15.6–31.2 | 31.2–62.5 | 2 : 1 | |||
| Cs4 | 30.9 | 15.6–31.2 | 31.2–62.5 | 1 : 1 | |||
| Lippia sidoides (Ls) | 62.5–125 | 125–250 | Ls1 | 13.6 | 250–500 | 500–1000 | 2 : 1 |
| Ls2 | 33.3 | 62.5–125 | 250–500 | 4 : 1 | |||
| Ls3 | 26 | 62.5–125 | 125–250 | 2 : 1 | |||
| Ls4 | 6.1 | 62.5–125 | 125–250 | 2 : 1 | |||
| Ls5 | 1.7 | 62.5–125 | 125–250 | 2 : 1 | |||
1The fractions from selected EO were considered bactericidal when the MBC : MIC ratio was between 1 : 1 to 2 : 1, and bacteriostatic if this ratio was higher than 2 : 1. 2The fractions in bold font were selected as active fractions and evaluated against S. mutans biofilm and for their antiproliferative action. The subscript numbers of the fractions represent the numbers of parts obtained using the dry column fractionation.