Corymbia citriodora Essential Oil Antimicrobial Activity in vitro

Abstract

Medium to large evergreen Corymbia citriodora (Eucalyptus citriodora) trees have smooth, powdery bark that is light grey, cream, or pink in color. It is frequently grown as an ornamental tree and is widely cultivated in Australia for its timber and essential oil. Herbal remedies are made from its foliage. It produces an essential oil that can be used to treat a variety of ailments, including clogged nasal passageways, cuts wounds, sore throats, and skin infections. The aim of the study was to determine the antimicrobial activity of Corymbia citriodora essential oil (CCEO) against ten microorganisms Candida albicans CCM 8186, C. glabrata CCM 8270, C. krusei CCM 8271, C. tropicalis CCM 8223, Staphylococcus aureus subsp. aureus CCM 4223, Micrococcus luteus CCM 732, Listeria monocytogenes CCM 4699, Escherichia coli CCM 3954, Pseudomonas putida CCM 1977, and Enterobacter aerogenes CCM 2531. The antimicrobial activity of CCEOs was evaluated using the disc diffusion method. The best antibacterial activity of CCEO against yeasts was found against C. tropicalis (17.33±0.58 mm). CCEO was most effective against Gram-positive bacteria M. luteus (9.33±0.58 mm) and Gram-negative bacteria E. coli (12.67±0.58 mm). In conclusion, Candida species were most sensitive against Corymbia citriodora essential oil.