Determination of chemical compositions and antibacterial effects of selected essential oils against human pathogenic strains


ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS, vol.94, no.1, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 94 Issue: 1
  • Publication Date: 2022
  • Doi Number: 10.1590/0001-3765202220210074
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Animal Behavior Abstracts, Aquatic Science & Fisheries Abstracts (ASFA), BIOSIS, CAB Abstracts, Communication Abstracts, EMBASE, INSPEC, MEDLINE, Metadex, Veterinary Science Database, zbMATH, Directory of Open Access Journals, Civil Engineering Abstracts
  • Keywords: Antibacterial efficiency, essential oils, Fractional Inhibitory Concentration index, gas chromatography/mass spectrometry, Human pathogens, Minimum Inhibitory Concentration, ANTIMICROBIAL ACTIVITY, STAPHYLOCOCCUS-AUREUS, FOODBORNE PATHOGENS, COMBINATION, COMPONENTS, ANTIOXIDANT, CONSTITUENTS, STREPTOCOCCI, CINNAMON, EFFICACY
  • Çanakkale Onsekiz Mart University Affiliated: Yes


Increasing the rates of drug resistant bacteria, having adverse effects and also high costs of antibiotics lead to essential oils (EOs) with antibacterial properties have gained importance. The present study was predicted to evaluate antibacterial activity of cinnamon, lavender, tea tree, lemon, coconut, oregano, mint, laurel and eucalyptus EOs alone and in combination. Chemical components of effective EOs were examined through gas chromatography/mass spectrometry (GC/MS). Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC) assays were used to identify antibacterial effects of EOs against bacterial strains. The Fractional Inhibitory Concentration index (FICI) of the binary combinations of EOs was determined by checkerboard method. Carvacrol, linalool, linalyl acetate, 1,8-cineole, cinnamaldehyde, terpinen-4-ol and p-cymene were found main components of EOs. Oregano, cinnamon and tea tree EOs exhibited the strongest antibacterial activity with the MIC range between 0.03125-1.00% (v/v). Tea tree/lavender and cinnamon/lavender mixtures showed a synergistic effect against Streptococcus pyogenes and Streptococcus agalactiae. Oregano with tea tree and laurel exhibited a synergistic effect against Staphylococcus aureus. Oregano showed a synergistic effect when combined with cinnamon, lavender and tea tree against S.agalactiae. Our findings indicated that EOs either alone or in combination against pathogens should be preferred as potential antibacterial agents.