The In Vitro Antimicrobial Effects of Lavandula angustifolia Essential Oil in Combination with Conventional Antimicrobial Agents

Figure 2

Isobologram representation of L. angustifolia essential oil in combination with chloramphenicol, ciprofloxacin, and fusidic acid at various ratios against S. aureus (ATCC 6538). ● indicates L. angustifolia essential oil in majority volume, ▲ indicates the antimicrobial agent in majority volume, and indicates equal volume of L. angustifolia essential oil to antimicrobial agent. Points 1–9 (Table 1) provide exact concentrations for antimicrobial and lavender oil.