In VitroAntibacterial Activity of Essential Oils againstStreptococcus pyogenes

Abstract

Streptococcus pyogenes plays an important role in the pathogenesis of tonsillitis. The present study was conducted to evaluate the in vitro antibacterial activities of 18 essential oils chemotypes from aromatic medicinal plants against S. pyogenes. Antibacterial activity of essential oils was investigated using disc diffusion method. Minimum Inhibitory Concentration of essential oils showing an important antibacterial activity was measured using broth dilution method. Out of 18 essential oils tested, 14 showed antibacterial activity against S. pyogenes. Among them Cinnamomum verum, Cymbopogon citratus, Thymus vulgaris CT thymol, Origanum compactum, and Satureja montana essential oils exhibited significant antibacterial activity. The in vitro results reported here suggest that, for patients suffering from bacterial throat infections, if aromatherapy is used, these essential oils, considered as potential antimicrobial agents, should be preferred.

Medicinal plants of the family Lamiaceae as functional foods - a review

“…antinociceptive and anti-inflammatory (Hajhashemi et al 2002); antibacterial (Dincer et al 2013); antioxidant (Yesiloglu et al 2013) leaves antimicrobial (Rota et al 2004);antibacterial (Nedorostova et al 2011;Sfeir et al 2013); cytotoxic, antioxidant, and antimicrobial (Miladi et al 2013); antioxidant and antimicrobial (Cavar et al 2008) leaves and flowered aerial part 42 Scutellaria baicalensis antioxidant and antiinflamatory (Seok et al 2016); cardiovascular, kidney, and liver diseases (Lai et al 2016) leaves 43 Scutellaria indica L. antitumour (Min et al 1997); antioxidant (Kim et al 2009) leaves 44 Sideritis scardica Griseb.…”

Monoterpene isolated from the essential oil of Trachyspermum ammi is cytotoxic to multidrug-resistant Pseudomonas aeruginosa and Staphylococcus aureus strains

“…Disk diffusion assay: the disc agar diffusion (DAD) method was performed as described previously (13) . The bacterial suspension was adjusted to a density of 0.5McFarland to obtain an inoculum of approximately 1.0 × 10 8 CFU/mL.…”

“…Subsequently, agar plates were incubated for 24h at 37°C. The diameters of the inhibition zone were measured in millimeters and were compared with the results obtained from the reference strains (12) (13) .…”

Determination of shelf life of Chelidonium majus, Sambucus nigra, Thymus vulgaris and Thymus serpyllum herbal tinctures by various stability-indicating tests

“…serpyllum, respectively) are traditionally used as expectorants and antimicrobials in upper respiratory infections because of their bronchoantispasmodic, expectorant and antibacterial activity (Blumenthal et al, 2000;Staszek et al, 2014). Antibacterial activity is attributed to its essential oil (Lakis et al, 2012;Sfeir et al, 2013), containing phenolic compounds thymol and carvacrol (Móricz et al, 2012;Staszek et al, 2014). Spasmolytic effect is attributed to the same, in synergy with the flavonoids (Engelbertz et al, 2012).…”