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Objective:To demonstrate the in vitro antibacterial properties of five essential oils against ten bacterial strains and study the synergistic effect of the combination of essential oils with standard antibiotics.Methods:Origanum compactum,Chrysanthemum coronarium,Thymus willdenowii Boiss,Melissa officinalis and Origanum majorana L.were used alone and combined used with standard antibiotics to evaluate their antimicrobial activities.The disk diffusion method was employed.Results:The results showed that the combined application of the essential oils of the plants with antibiotics led to a synergistic effect in some cases,but antagonistic effect was also observed in some bacteria.Conclusions:This study shows that the combination of essential oils of the five plants with antibiotics may be useful in the fight against emerging microbial drug resistance.
Objective: To demonstrate the in vitro antibacterial properties of five essential oils against ten bacterial strains and study the synergistic effect of the combination of essential oils with standard antibiotics. Methods: Origanum compactum, Chrysanthemum coronarium, Thymus willdenowii Boiss, Melissa officinalis and Origanum majorana L .were used alone and combined used with standard antibiotics to evaluate their antimicrobial activities. The disk diffusion method was employed. Results: The results showed that the combined application of the essential oils of the plants with antibiotics led to a synergistic effect in some cases, but antagonistic effect was also observed in some bacteria. Conclusions: This study shows that the combination of essential oils of the five plants with antibiotics may be useful in the fight against emerging microbial drug resistance.