Antimicrobial Properties of Plant Essential Oils against Human Pathogens and Their Mode of Action: An Updated Review

Mallappa Kumara Swamy, Mohd Sayeed Akhtar, Uma Rani Sinniah, Mallappa Kumara Swamy, Mohd Sayeed Akhtar, Uma Rani Sinniah

Abstract

A wide range of medicinal and aromatic plants (MAPs) have been explored for their essential oils in the past few decades. Essential oils are complex volatile compounds, synthesized naturally in different plant parts during the process of secondary metabolism. Essential oils have great potential in the field of biomedicine as they effectively destroy several bacterial, fungal, and viral pathogens. The presence of different types of aldehydes, phenolics, terpenes, and other antimicrobial compounds means that the essential oils are effective against a diverse range of pathogens. The reactivity of essential oil depends upon the nature, composition, and orientation of its functional groups. The aim of this article is to review the antimicrobial potential of essential oils secreted from MAPs and their possible mechanisms of action against human pathogens. This comprehensive review will benefit researchers who wish to explore the potential of essential oils in the development of novel broad-spectrum key molecules against a broad range of drug-resistant pathogenic microbes.

Conflict of interest statement

The authors declare that there is no conflict of interests.

Figures

Figure 1
Figure 1
Structures of some important chemical compounds of essential oils.
Figure 2
Figure 2
Antimicrobial mechanisms of essential oils on microbes.

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