Antibacterial activity of selected seaweeds from the coast of Rabon, Rosario, La Union, Philippines

<p>D A Peralta and L G Artartes</p>

Antibacterial activity of selected seaweeds from the coast of Rabon, Rosario, La Union, Philippines

D A Peralta and L G Artartes

Don Mariano Marcos Memorial State University, Philippines

: Arch Med Biotechnol

Abstract

Three commonly occurring marine macroalgae; Enteromorpha intestinalis, Gracillaria changii and Sargassum cristaefolium were collected from the coast of Rabon, Rosario, La Union and their antibacterial activities were screened against a gram positive bacteria (Staphylococcus aureus) and a gram negative bacteria (Escherichia coli). The phytochemical analysis of seaweeds revealed the following secondary metabolites; for E. intestinalis, non-hydrolyzable / condensed tannins and saponin glycosides were detected; for G. changii, saponin glycosides, anthraquinones, and flavonoids were present; E. intestinalis exhibits the highest antimicrobial activity against E. coli with the highest mean diameter of zone of inhibition. G. Changii exhibits the highest antimicrobial activity against S. aureus with the highest mean diameter of zone of inhibition