Introduction: The antimicrobial activity of essential oils (EOs) has been known for ages; in particular, the EOs of Melaleuca alternifolia, Thymusvulgaris, Menthapiperita, and Rosmarinusofficinalishave been used for the treatment of fungal and bacterial infections. Methodology: This study focused on the in vitrocytotoxicity to normal human conjunctiva cells and antimicrobial activity of 20 EOs. Results: The oils tested showed no cytotoxic effect at very low concentrations. Rosmarinusofficinalis, Melaleucaalternifolia, and ThymusvulgarisL. red thyme geraniol sel oils had good antimicrobial activity against Gram-positive and Gram-negativestrains. Conclusions: The results of this study are of great interest and may have a major impact on public health, providing useful tips to optimize the therapeutic use of some natural drugs. INTRODUCTION: The antimicrobial activity of essential oils (EOs) has been known for ages; in particular, the EOs of Melaleuca alternifolia, Thymus vulgaris, Mentha piperita, and Rosmarinus officinalis have been used for the treatment of fungal and bacterial infections. METHODOLOGY: This study focused on the in vitro cytotoxicity to normal human conjunctiva cells and antimicrobial activity of 20 EOs. RESULTS: The oils tested showed no cytotoxic effect at very low concentrations. Rosmarinus officinalis, Melaleuca alternifolia, and Thymus vulgaris L. red thyme geraniol sel oils had good antimicrobial activity against Gram-positive and Gram-negative strains. CONCLUSIONS: The results of this study are of great interest and may have a major impact on public health, providing useful tips to optimize the therapeutic use of some natural drugs.

Essential oils in ocular pathology: an experimental study / Cannas, S; Usai, D; Pinna, Antonio Daniele; Benvenuti, Stefania; Tardugno, Roberta; Donadu, M; Zanetti, S; Kaliamurthy, J; Molicotti, P.. - In: JOURNAL OF INFECTION IN DEVELOPING COUNTRIES. - ISSN 1972-2680. - 9:6(2015), pp. 650-654.

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