Volume 5, number 2
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Antibacterial activity of Piper nigrum – an in vitro study

A. Vijayakumar1, V. Ramnath2, A. Marie Arockianathan2, S. Arokiyaraj3 and Francis P. Xavier1*

1Department of Chemistry, Loyola College, Chennai - 34 India.

2Department of Biochemistry, St. Joseph’s College, Cuddalore India.

3Department of Biotechnology, Loyola College, Chennai - 34 India.

Corresponding Author E-mail: tit_vijay@yahoo.com

ABSTRACT: The present study was carried out to evaluate the antibacterial activity and phytochemical analysis of Piper nigrum. Ethanol and aqueous extracts were obtained and their antibacterial activity was carried out using disc diffusion method with gram positive and gram negative strains. The result indicated that ethanol extract was most active while aqueous extract was highly inactive. Preliminary phytochemical screening revealed the presence of terpenoids, alkaloids, flavonoids and carbohydrates. This study showed that ethanol extract of P. nigrum could be a potential source of new antibacterial agents

KEYWORDS: Antibacterial; medicinal plant; secondary metabolites

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Vijayakumar A, Ramnath V, Arockianathan A. M , Arokiyaraj S, Xavier F. P. Antibacterial activity of Piper nigrum – an in vitro study . Biosci Biotechnol Res Asia 2008;5(2).
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Vijayakumar A, Ramnath V, Arockianathan A. M , Arokiyaraj S, Xavier F. P. Antibacterial activity of Piper nigrum – an in vitro study . Biosci Biotechnol Res Asia 2008;5(2).Available from:

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