Antimicrobial activity of essential oils against foodborne multidrug-resistant enterococci and aeromonads in planktonic and biofilm state

Quendera, Ana Patrícia; Barreto, António Salvador; Semedo-Lemsaddek, Teresa

doi:10.1177/1082013218799027

Cited by 16 publications

(15 citation statements)

References 34 publications

(34 reference statements)

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“…25 Other options, such as pump inhibitors and essential oils, have been proved to have antibacterial activity against multidrug-resistant Enterococci in vitro. 26,27 Although previous studies showed 0.3% to 20% VRE were resistance to DAP, all isolates in our study were sensitive to DAP. 28,29 LNZ and DAP monotherapy showed effective anti-biofilm formation during 72 hours.…”

Section: Discussioncontrasting

confidence: 65%

In vitro Antimicrobial Activity of Fosfomycin, Rifampin, Vancomycin, Daptomycin Alone and in Combination Against Vancomycin-Resistant Enterococci

Tong¹,

Jiang²,

Xu³

et al. 2021

DDDT

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The emergence of vancomycin resistant Enterococci (VRE) is shortening the choices for clinical anti-infective therapy. The aim of this study was to investigate the mechanism of vancomycin resistance and evaluate the effect of fosfomycin (FM), rifampin (RIF), vancomycin (VAN), linezolid (LNZ), daptomycin (DAP) alone or in combination against VRE. Methods: Eight VRE isolates were collected. A total of 18 antibiotics susceptibility tests were further done for VRE. Whole genome sequencing and bioinformatics analysis were performed. The effect of FM, RIF, VNA, LNZ, DAP alone or in combination was determined using anti-biofilm testing and the time-kill assay. Results: All isolates were susceptible to LNZ and DPA. The high-level resistance determinant of VAN in these strains was due to VanA-type cassette. MLST revealed two different STs for vancomycin-resistant Enterococcus faecium (VREm) and four different STs for vancomycin-resistant E. faecalis (VREs). Virulence genes in VREs were more than VREm, especially for 4942 isolated from blood. Gene acm and uppS were only identified in VREm, while virulence genes related to cytolysin were only found in E. faecalis. Further in vitro studies indicated FM (83 mg/L) combined with DAP (20.6 mg/L) and DAP monotherapy (47.1 mg/L) had bactericidal effect against VRE isolates at 24h. Conclusion: High-level resistance determinant of VAN in tested isolates was due to VanAtype cassette. FM combined with DAP is a potential therapeutic option for VRE infections.

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Section: Discussioncontrasting

confidence: 65%

In vitro Antimicrobial Activity of Fosfomycin, Rifampin, Vancomycin, Daptomycin Alone and in Combination Against Vancomycin-Resistant Enterococci

Tong¹,

Jiang²,

Xu³

et al. 2021

DDDT

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“…In our research, among tested essential oils, TO showed the highest antibacterial activity against Aeromonas species, although the MIC values of TO were higher than TC. Quendera et al [36] also investigated antimicrobial activity of commercial TO against Aeromonas species and obtained MIC values were between 0.47 and 1.9 mg/mL. In our study, the MIC values of TO for most strains ranged from 0.39 to 0.78 mg/mL.…”

Section: Discussionsupporting

confidence: 55%

Antibacterial Activity of Commercial Phytochemicals against Aeromonas Species Isolated from Fish

et al. 2019

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Antimicrobial activities of phytochemicals—trans-cinnamaldehyde (TC), ferulic acid (FA), p-coumaric acid (p-CA), caffeic acid (CA), chlorogenic acid (CHA), Thymus vulgaris essential oil (TO), Eugenia caryophyllus essential oil (ECO), and Melaleuca alternifolia oil (TTO) against Aeromonas species—were assessed. Growth of all Aeromonas salmonicida subsp. salmonicida and almost all Aeromonas sobria strains was inhibited by TC at concentration 0.01 mg/mL, and for most Aeromonas hydrophila strains minimal inhibitory concentrations (MIC) ranged from 0.01 to 0.19 mg/mL. The inhibitory effect of TC against A. salmonicida subsp. salmonicida was comparable to the effect of oxytetracycline, and in the case of A. salmonicida subsp. salmonicida and A. sobria was higher compared to gentamicin. MIC of FA, p-CA, and CA for most strains ranged from 1.56 to 3.12 mg/mL, and MIC values of TO for most strains ranged from 0.39 to 0.78 mg/mL. TO and TC at the concentrations below ½ MIC values used in mixtures exhibited strong synergism. ECO and TC showed synergy in mixture of ⅛ MIC of ECO and ¼ MIC of TC. TC and TO exhibited the strongest inhibitory and bactericidal effect against investigated Aeromonas species, and they are a promising alternative to the use of antibiotics in controlling the growth of these fish pathogens.

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“…They are mixtures of aromatic compounds, including terpenes, terpenoids, phenols, and rakebones [9,10]. Essential oils, due to their huge biological activity, are used, among others, in the food industry as natural preservatives in order to reduce or eliminate the addition of preservative chemicals to foods such as cereals, grains, pulses, fruits, and vegetables [11,12].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Selected Plant Essential Oils on Morphological and Physiological Characteristics in Pseudomonas Orientalis

Leja

Szudera-Kończal

Świtała

et al. 2019

Foods

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The aim of this work was to estimate the antibacterial activity of selected essential oils on Pseudomonas orientalis strains isolated from foods. An attempt was also made to identify the mechanisms of the action of the plant oils. Classical methods of assessment of the effectiveness of antimicrobial activity of oils were linked with flow cytometry. It was observed that bergamot, lemongrass, bitter orange, juniper, and black pepper oils have bacteriostatic effect against P. orientalis P49. P. orientalis P110 is sensitive to lime, lemongrass, juniper, rosemary, and black pepper oils. Additionally, plant oils with biostatic effect on P. orientalis limited the intracellular metabolic activity of cells; this was closely linked with the ability of plant oils’ bioactive components to interact with bacteria cell membrane, causing the release of membrane proteins. As a result, the selective permeability of the cell membranes were damaged and the bacterial shape was transformed to coccoid in form.

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Antimicrobial activity of essential oils against foodborne multidrug-resistant enterococci and aeromonads in planktonic and biofilm state

Cited by 16 publications

References 34 publications

In vitro Antimicrobial Activity of Fosfomycin, Rifampin, Vancomycin, Daptomycin Alone and in Combination Against Vancomycin-Resistant Enterococci

In vitro Antimicrobial Activity of Fosfomycin, Rifampin, Vancomycin, Daptomycin Alone and in Combination Against Vancomycin-Resistant Enterococci

Antibacterial Activity of Commercial Phytochemicals against Aeromonas Species Isolated from Fish

The Influence of Selected Plant Essential Oils on Morphological and Physiological Characteristics in Pseudomonas Orientalis

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