Jun 26, 2009

Comparison of bacteriostatic and bactericidal activity of 13 essential oils against strains with varying sensitivity to antibiotics

Letters in Applied Microbiology
L MayaudG Aubert

Abstract

To compare the bacteriostatic and bactericidal activity of 13 chemotyped essential oils (EO) on 65 bacteria with varying sensitivity to antibiotics. Fifty-five bacterial strains were tested with two methods used for evaluation of antimicrobial activity (CLSI recommendations): the agar dilution method and the time-killing curve method. EO containing aldehydes (Cinnamomum verum bark and Cymbopogon citratus), phenols (Origanum compactum, Trachyspermum ammi, Thymus satureioides, Eugenia caryophyllus and Cinnamomum verum leaf) showed the highest antimicrobial activity with minimum inhibitory concentration (MIC) <2% (v/v) against all strains except Pseudomonas aeruginosa. Alcohol-based EO (Melaleuca alternifolia, Cymbopogon martinii and Lavandula angustifolia) exhibited varying degrees of activity depending on Gram status. EO containing 1.8-cineole and hydrocarbons (Eucalyptus globulus, Melaleuca cajeputii and Citrus sinensis) had MIC(90%) > or = 10% (v/v). Against P. aeruginosa, only C. verum bark and O. compactum presented MIC < or =2% (v/v). Cinnamomum verum bark, O. compactum, T. satureioides, C. verum leaf and M. alternifolia were bactericidal against Staphylococcus aureus and Escherichia coli at concentrations ranging from to 0...Continue Reading

  • References20
  • Citations28

References

  • References20
  • Citations28

Citations

Mentioned in this Paper

Thymus saturejoides
Pseudomonas aeruginosa (antigen)
Antibiotic throat preparations
Melaleuca alternifolia
Antifungal Antibiotics, Topical
Antibiotics, Gynecological
Bactericidal Activity
ADRBK1 wt Allele
Pseudomonas aeruginosa
Lavandula angustifolia

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