African Journal of

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12368

Full Length Research Paper

Evaluation of in vitro antibacterial property of seaweeds of southeast coast of India

M. Kandhasamy1,2 and K. D. Arunachalam3*
  1Department of Microbiology, PGP College of Arts and Sciences, Namakkal. Tamil Nadu, India. 2Centre for Marine and Coastal Studies, School of Energy Sciences, Madurai Kamaraj University, Madurai, Tamil Nadu, India – 625 021. 3Department of Bio-Technology, SRM University, Chennai, Tamil Nadu, India.
Email: [email protected]

  •  Published: 17 June 2008



The in vitro antibacterial activities of seaweeds belong to Chlorophyceae (Caulerpa racemosa and Ulva lactuca), Rhodophyceae (Gracillaria folifera andHypneme muciformis) and Phaeophyceae (Sargassum myricocystum,Sargassum tenneerimum and Padina tetrastomatica) were studied against both Gram-negative and Gram-positive pathogenic bacteria. Methanolic extracts of all seaweed extracts tested in the present study exhibited broad spectrum of antibacterial activity. Chlorophyceae members showed high antibacterial activity than other members of the algae tested in the present investigation. Escherchia coli alone resistant to all the seaweed extracts except S. teneerimum. Results of the present study confirmed the potential use of seaweed extracts as a source of antibacterial compounds.


Key words: Seaweeds, antibacterial activity, methanolic extracts, pathogenic bacteria.