Chemical composition and antimicrobial activity of <Emphasis Type="Italic">Thymus pannonicus</Emphasis> All. (<Emphasis Type="Italic">Lamiaceae</Emphasis>) essential oil |
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Authors: | Zoran Maksimovi? Marina Milenkovi? Dragana Vu?i?evi? Mihailo Risti? |
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Institution: | (1) Institute of Pharmacognosy, School of Pharmacy, University of Belgrade, 11221 Belgrade, Serbia;(2) Institute of Microbiology and Immunology, School of Pharmacy, University of Belgrade, 11221 Belgrade, Serbia;(3) Institute for Medicinal Plant Research „Dr Josif Pančić“, 11000 Belgrade, Serbia |
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Abstract: | This paper presents the results of a study on chemical composition and antimicrobial activity of Thymus pannonicus All. (Lamiaceae) essential oil from Vojvodina province (north of Serbia). The investigated oil was hydrodistilled from a flowering plant
and analysed by GC and GC-MS. Fifty-three constituents were identified (>97% of total oil), with geranial (41.42%, w/w) and
neral (29.61%, w/w) as the most prominent. The antimicrobial activity of the oil was evaluated using agar disc diffusion and
broth microdilution method against Staphylococcus aureus, Enterococcus faecalis, Pseudomonas aeruginosa, Escherichia coli, two strains of Klebsiella pneumoniae and two strains of Candida albicans. The essential oil exhibited antimicrobial activity to varying degrees against all tested strains. The maximum activity of
T. Pannonicus oil was observed against E. coli, S. aureus and both tested strains of C. Albicans (MIC = 50 μ/ml, each). Moderate activity was observed against P. aeruginosa and one of the tested strains of K. Pneumoniae (MIC = 200 μ/ml), while E. faecalis and the other strain of K. Pneumoniae expressed a higher degree of resistance (MIC > 200 μ/ml). This study confirms that essential oil of T. pannonicus possesses remarkable in vitro antimicrobial activity against several medicinally important pathogens. This is attributable to lemon-scented citral, a mixture
of geranial and neral, which has well-documented antimicrobial activity against a range of bacteria and fungi. |
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Keywords: | Thymus pannonicus Essential oil composition Antimicrobial activity Geranial Neral |
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