In-Vitro Antibacterial Activity of Selected Medicinal Plants

Author

Hariom Kishor Pranjale, Dr. Revathi A. Gupta, Ms. Seema Sahni


Abstract

 Medicinal plants have long been used as natural sources of therapeutic agents. Their antibacterial properties are mainly associated with secondary metabolites such as alkaloids, flavonoids, tannins, phenolics, saponins, terpenoids and glycosides. The present study focused on the comparative in-vitro antibacterial potential of three commonly used medicinal plants, namely Azadirachta indica (Neem), Murraya koenigii (Curry leaf) and Psidium guajava (Guava). Leaves of the selected plants were processed, extracted and subjected to preliminary phytochemical screening. The antibacterial activity of the extracts was evaluated against Staphylococcus aureus and Escherichia coli using the agar well diffusion method at concentrations of 25, 50, 75 and 100 mg/mL. The observations provided in the project file showed a concentration-dependent increase in inhibition zones for all three plant extracts. Among the selected plants, Psidium guajava showed the highest reported inhibition, followed by Azadirachta indica and Murraya koenigii. The findings indicate that these medicinal plants contain bioactive constituents with potential antibacterial activity and may serve as useful candidates for further investigation. 



Keywords

Medicinal plants, antibacterial activity, Azadirachta indica, Murraya koenigii, Psidium guajava, agar well diffusion, phytochemicals.



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References


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