Działanie olejku lawendowego (Oleum Lavandulae) na bakterie beztlenowe

Abstract

Introduction. Therapeutical, cosmetical and culinary properties of lavender oil was valued from ancient. Lavandula angustifolia Mill. (Lavandula officinalis Chaix.) belonging to the family Lamiaceae. Lavender produced essential oil. It possess different property: hepatoprotective, antidiabetic, antispasmotic, antiulcers, antidepression, antioxidant, antireumatic, insect repellent and antimicrobial. Aim. The aim of this work was to investigate the susceptibility of anaerobes of oral cavity to lavender oil. Material and methods. The anaerobic bacteria were isolated from various infections of oral cavity. A total 32 strains of bacteria isolated from patients and 5 reference strains were examined. The susceptibility (MIC) anaerobes to lavender oil was determined by means of plate dilution technique in Brucella agar, supplemented with 5% defibrynated sheep blood, menadione and hemin. Stock solution of essential oil was prepared in dimethylsulfoxide (DMSO) and afterwords in distilled water. Concentration of oil used were: 0.12, 0.25, 0.5, 1.0 and 2.0 mg/ml. The inoculum contained 106 CFU per spot was seeded with Steers’ replicator upon the surface of agar with oil and without the oil (strains growth control). Incubation was performed in anaerobic conditions in anaerobic jars, at 37°C for 48 hrs. The MIC was interpreted as the lowest concentration of lavender oils inhibiting the growth of tested anaerobic bacteria. Results. The results indicated, that from all tested anaerobes 10 (31%) was susceptible in ranges < 0.12-0.5 mg/ml. The oil was active towards 53% strains in concentration = 1.0 mg/ml. The MIC for remaining strains was > 2.0 mg/ml. From the Gram-positive cocci the most susceptible were the strains Peptostreptococcus anaerobius. MIC of the strains were < 0.12 mg/ml. The Gram-positive rods were the lowest sensitive. The lavender oil inhibited growth of this bacteria in concentration = 1.0 mg/ml. Conclusions. The more susceptible to lavender oil, from Gram-negative bacteria were the genus Bacteroides vulgatus, Bacteroides uniformis and from Gram-positive cocci genus Peptostreptococcus anaerobius. The Gram-negative anaerobes were less susceptible to tested oil than Gram-positive anaerobic bacteria.