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Published in: BMC Complementary Medicine and Therapies 1/2020

01-12-2020 | Itraconazole | Research article

Evaluation of antimicrobial activity of the hydrolate of Coridothymus capitatus (L.) Reichenb. fil. (Lamiaceae) alone and in combination with antimicrobial agents

Authors: Andreana Marino, Antonia Nostro, Narcisa Mandras, Janira Roana, Giovanna Ginestra, Natalizia Miceli, Maria Fernanda Taviano, Fabrizio Gelmini, Giangiacomo Beretta, Vivian Tullio

Published in: BMC Complementary Medicine and Therapies | Issue 1/2020

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Abstract

Background

Hydrolates, complex mixtures containing traces of essential oils (EOs), are inexpensive, easy to make and less toxic than their corresponding EOs. The antibacterial and antifungal activity of the hydrolate of Coridothymus capitatus (L.) Reichenb. fil. (Lamiaceae) alone and in combination with antimicrobial drugs, such as tetracycline and itraconazole, were evaluated.

Methods

The chemical composition was analysed by gas-chromatography-mass spectrometry (GC-MS). Standard methods were performed to evaluate the susceptibility of some Gram-positive and Gram-negative bacteria, and Candida spp. to the hydrolate, in comparison with its EO. The hydrolate mechanism of action was assayed by propidium iodide and MitoTracker staining. Checkerboard tests were carried out for combinations studies.

Results

GC-MS identified 0.14% (v/v) of total EO content into hydrolate and carvacrol as a dominant component. The hydrolate showed a good antimicrobial activity against bacteria and yeasts. It exhibited a synergistic effect with itraconazole against Candida krusei, and an additive effect with tetracycline against methicillin-resistant Staphylococcus aureus strains. Hydrolate changed the membranes permeability of bacteria and yeasts and altered mitochondrial function of yeasts.

Conclusions

Our study extends the knowledge by exploiting non-conventional antimicrobial agents to fight the emergence of antibiotic resistance.
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Metadata
Title
Evaluation of antimicrobial activity of the hydrolate of Coridothymus capitatus (L.) Reichenb. fil. (Lamiaceae) alone and in combination with antimicrobial agents
Authors
Andreana Marino
Antonia Nostro
Narcisa Mandras
Janira Roana
Giovanna Ginestra
Natalizia Miceli
Maria Fernanda Taviano
Fabrizio Gelmini
Giangiacomo Beretta
Vivian Tullio
Publication date
01-12-2020
Publisher
BioMed Central
Published in
BMC Complementary Medicine and Therapies / Issue 1/2020
Electronic ISSN: 2662-7671
DOI
https://doi.org/10.1186/s12906-020-2877-x

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