Evaluation of the Antimicrobial Activity of 20 Essential Oils and Their Combinations on Bacterial and Fungal Strains

Tests revealed that <i>Origanum vulgare, Cymbopogon citratus,</i> and <i>Thymus leptobotrys</i> were particularly effective against Gram-positive bacteria and yeasts, while others, such as <i>Citrus limon</i>, showed negligible activity. The combinations of oils generally produced indifferent or antagonistic effects, especially against <i>P. aeruginosa.</i> Conclusion: The results could open new perspectives for natural antimicrobial treatments, thus contributing to the fight against antibiotic resistance. In addition, the study will highlight the importance of judicious use of EO combinations to avoid interactions that could compromise their effectiveness.