Assessment of the antibacterial activity of four essential oils and the biobactericide Neco.

The purpose of this study was to assessin vitro the activity of four essential oils (Cymbopogon citratus, Eucalyptus citriodora, Lippia multiflora, Melaleuca quinquenervia) and the biobactericide Neco ® on Gram-positive bacteria.The aromatogram and antibiogram were assessed by the agar well diffusion method and the Muller Hinton disk-agar diffusion method, respectively. Also, the minimum inhibitory concentration and the minimum bactericidal concentration were determined by the microdilution method in liquid medium.The aromatogram showed that the biobactericide Neco ® induced the largest inhibition diameters (34.53 ± 11.82 - 43.92 ± 5.38 mm) of all strains combined, followed by the essential oils ofEucalyptus Citriodora (30.01 ± 3.02 - 41.89 ± 1.77 mm) andLippia multiflora (20.72 ± 4.72 - 37.61 ± 2.80 mm). However, the essential oils ofMelaleuca quinquenervia (19.99 ± 3.93 - 26.20 ± 13.27 mm) andCymbopogon citratus (13.52 ± 3.59 - 29.08 ± 2.35 mm) had the smallest inhibition diameters. Moreover, the comparison of the activities of the aromatogram and antibiogram revealed generally that activities were higher with essential oils than with antibiotics.At the end of this study, the essential oils ofCymbopogon citratus,Eucalyptus citriodora, Lippia multiflora, Melaleuca quinquenervia and the biobactericide Neco ® had an antibacterial activity on Gram+ bacteria.

Source: International Journal of Phytomedicine - September 2, 2017 Category: Science Authors: Jean-Fabrice Yala Source Type: research