Phytochemical and antimicrobial properties of Lavender angustifolia and Eucalyptus camaldulensis essential oils

Abstract

This study was aimed to investigate chemical composition, antibacterial and antifungal activities of Lavender (Lavandula angustifolia) and Eucalyptus(Eucalyptus camaldulensis) essential oils. The essential oils which prepared via distillation by Clevenger unit analyzed by GC- MS. Antibacterial effect of essential oils were tested against Listeria monocytogenes, Bacillus cereus,Salmonella thyphimurium,and Escherichia coli using disc diffusion, agar well diffusion and broth microdilution methods and against Candida strains by broth micro dilution. The most inhibition zone of Lavender essential oil was related to S. thyphimurium and L. monocytogenes and B. cereus in disk diffusion and B. cereus in agar well diffusion method. The lowest minimum inhibitory concentration (MIC) for Lavender essential oil was 6 μl/ml, against S.thyphimurium. The MIC value of Lavender against L. monocytogenes, E. coli and B. cereus were 25, 12.5, 12.5 μl/ml respectively. The MIC value of Eucalyptusagainst S. thiphymurium, L. monocytogenes, E. coli and B. cereus were 25, 12.5,12.5, 12.5 μl/ml respectively. The MIC value of Eucalyptus essential oil against C. albicans, C. tropicalis, C. dubliniensis and C. parapsilosis were 0.2%,0.1%, 0.4% and 0.4%, respectively. The MIC value ofLavender essential oil against C. albicans, C. tropicalis, C. dubliniensis and C. parapsilosis were 0.4%,0.4%, 1.6% and 1.6%, respectively.