Antimicrobial Properties of Thyme Essential Oil on Salmonella Typhimurium

AbstractThe aim of this work was to investigate the antimicrobial properties of thyme essential oil against clinical multiresistant strains of Acinetobacter spp. The antibacterial activity of oil was tested against standard and clinical bacterial strains of Acinetobacter genus. The agar diffusion method was used to check the inhibition of microbial growth at various concentrations of the oil from Thymus vulgaris. Susceptibility testing to antibiotics and chemotherapeutics was prepared using the disc-diffusion method. Identification of bacterial strains was carried out with the Vitek system and confirmed by PCR for Acinetobacter baumanii gyrB gene. The results of experiments showed that the oil from T. vulgaris exhibited an extremely strong activity against all of the clinical strains of Acinetobacter. Thyme oil demonstrated a very good efficacy against multiresistant strains of tested bacteria. Essential oils seems to be an excellent alternative for synthetic preparations and that is reason for an extensive assessment of their antimicrobial activity.

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Chitosan/Thyme Oil Systems as Affected by Stabilizing Agent: Physical and Antimicrobial Properties

Coatings ◽

10.3390/coatings9030165 ◽

2019 ◽

Vol 9 (3) ◽

pp. 165 ◽

Cited By ~ 6

Author(s):

Jana Sedlaříková ◽

Magda Janalíková ◽

Ondřej Rudolf ◽

Jana Pavlačková ◽

Pavlína Egner ◽

...

Keyword(s):

Essential Oil ◽

Antimicrobial Properties ◽

Barrier Properties ◽

Tween 20 ◽

Stabilizing Agents ◽

Chitosan Matrix ◽

Thyme Essential Oil ◽

Hydrophilic Lipophilic Balance ◽

Film Forming ◽

Chitosan Films

Antimicrobial biopolymer films and coatings are of great interest for many applications. Different chitosan systems were prepared and characterized to evaluate the effect of their composition on the physical and antimicrobial properties. Three types of emulsifiers (Tween 20, 80, and 85) were used as stabilizing agents, combined with thyme essential oil (from two producers) applied as an active substance. A predominant role of the applied stabilizer and its hydrophilic–lipophilic balance value was proven. The incorporation of thyme essential oil and surfactant into the chitosan matrix led to a significant decrease of particle size in film-forming solutions, as well as a thickness increase and the enhancement of the barrier properties in chitosan films. Antimicrobial effects were provided even at the lowest tested concentration of thyme essential oil. Hence, the prepared chitosan films represent promising candidates in antimicrobial packaging applications.

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Antioxidant and antimicrobial properties of thyme essential oil encapsulated in zein particles

Flavour and Fragrance Journal ◽

10.1002/ffj.3254 ◽

2015 ◽

Vol 30 (5) ◽

pp. 392-398 ◽

Cited By ~ 23

Author(s):

Tugca Bilenler ◽

Incilay Gokbulut ◽

Kubra Sislioglu ◽

Ihsan Karabulut

Keyword(s):

Essential Oil ◽

Antimicrobial Properties ◽

Thyme Essential Oil

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Synergistic and antimicrobial properties of commercial turmeric (Curcuma longa) essential oil against pathogenic bacteria

Food Science and Technology ◽

10.1590/s0101-20612012005000082 ◽

2012 ◽

Vol 32 (3) ◽

pp. 525-530 ◽

Cited By ~ 2

Author(s):

Sara Albino Antunes ◽

Weber da Silva Robazza ◽

Liziane Schittler ◽

Gilmar de Almeida Gomes

Keyword(s):

Ascorbic Acid ◽

Listeria Monocytogenes ◽

Essential Oil ◽

Salmonella Typhimurium ◽

Pathogenic Bacteria ◽

Curcuma Longa ◽

Antioxidant Properties ◽

Radical Scavenging ◽

Antimicrobial Properties ◽

Dpph Radical Scavenging

Several studies have shown the antimicrobial and antioxidant properties of turmeric (Curcuma longa), widely used in food industry as a colorant, among other functions. The aim of this study was to determine the antioxidant and antimicrobial properties of turmeric essential oil against pathogenic bacteria and to study the influence of the addition of ascorbic acid on the prevention of polyphenols oxidation. The commercial turmeric essential oil alone did not show bactericidal activity against the microorganisms studied, Listeria monocytogenes and Salmonella typhimurium, but when combined with ascorbic acid, it showed significant antibacterial activity. The highest antimicrobial activity of turmeric essential oil against Salmonella typhimurium was 15.0 ± 1.41 mm at the concentration of 2.30 mg.mL-1 of essential oil and 2.0 mg.mL-1 of ascorbic acid. With regard to Listeria monocytogenes, the largest zone of inhibition (13.7 ± 0.58 mm) was obtained at the same concentrations. The essential oil showed antioxidant activity of EC50 = 2094.172 µg.mL-1 for the DPPH radical scavenging method and 29% under the concentration of 1.667 mg.mL-1 for the β-carotene bleaching method.

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