Author(s): B. R. Malathy, Sweetlin Ajitha P, Sangeetha K. S, Swetha Thampy, Kamala G


DOI: 10.52711/0974-360X.2021.00771   

Address: Dr. B. R. Malathy1, Sweetlin Ajitha P2, Sangeetha K. S3, Swetha Thampy3, Kamala G3
1Reader, Department of Microbiology, Sathyabama Dental College and Hospital, Chennai – 600119.
2Research Scholar, Department of Microbiology, Sathyabama Dental College and Hospital, Chennai – 600119.
3IVth Year BDS Students, Sathyabama Dental College and Hospital, Chennai – 600119.
*Corresponding Author

Published In:   Volume - 14,      Issue - 8,     Year - 2021

Essential oils (EOs) are natural extracts from the seeds, stems, roots, flowers, bark and other parts of the plant prepared by steam distillation. They are complex, volatile, natural compounds formed by aromatic plants as secondary metabolites. They are known for their bactericidal, virucidal, fungicidal, sedative, anti-inflammatory, analgesic, spasmolytic and locally anesthetic properties. They are generally composed of a combination of substances like terpenes, phenolics, aldehydes or alcohols. The complex composition and different mechanisms of action of EOs may be an advantage over other antimicrobials to prevent the development of resistance of pathogenic bacteria. With this background, the aim of this study was to evaluate the antimicrobial activity of five essential oils like basil, lime, rosemary, thyme and canada balsam against 14 microbes. The effects of essential oil on the selected microbes were determined by agar well diffusion method. The zone of inhibition was observed and measured in millimeter. Essential oils which showed inhibitory diameter >15 mm were further tested to determine the minimum inhibitory concentration (MIC). S. aureus, E. coli, S. mutans, S. sanguinis, C. albicans and M. furfur were inhibited by all essential oils. K. pneumoniae, P. aeruginosa and E .faecalis were inhibited only by thyme and not by other essential oils. The MIC values ranged from 50% to 0.10%. The least MIC value of 0.10% was shown by thyme and basil to S. aureus, thyme to E.coli and all essential oils against C. albicans except lime.

Cite this article:
B. R. Malathy, Sweetlin Ajitha P, Sangeetha K. S, Swetha Thampy, Kamala G. Antimicrobial activity of Commercial essential oils on human pathogens. Research Journal of Pharmacy and Technology. 2021; 14(8):4440-4. doi: 10.52711/0974-360X.2021.00771

B. R. Malathy, Sweetlin Ajitha P, Sangeetha K. S, Swetha Thampy, Kamala G. Antimicrobial activity of Commercial essential oils on human pathogens. Research Journal of Pharmacy and Technology. 2021; 14(8):4440-4. doi: 10.52711/0974-360X.2021.00771   Available on:

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