Abstract

STUDIES ON ANTIBACTERIAL POTENTIALS OF MICROALGAE OSCILLATORIA LUTEA AGAINST HUMAN PATHOGENIC BACTERIA

N. PadmaPriya and T.V. Poonguzhali

Abstract

Oscillatoria lutea is a blue green thylakoids coiled usually irregular throughout the cells. In the present study O. lutea was collected from fresh water lakes in and around Chennai, BG-11 culture media was used for cultivation under suitable lab conditions. Organic solvents used for extraction was cold ethanol, cold petroleum ether and cold ammonia solution. The present study aims to test its effectiveness against four strains of bacteria. Two gram (+) ve bacteria namely E. coli, K. pneumoniae and two gram (-)ve bacteria namely S. aureus, S. pyogenes by well diffusion method. Results showed the sensitivity in all bacteria. In cold ethanol extract, K. pneumonia and E. coli showed zone of inhibition with 17 and 20mm. In cold petroleum ether extract K. pneumoniae, E. coli showed zone of inhibition with rate of 15 and 24mm while in cold ammonia solution extract S. aureus showed inhibition of 19mm respectively.

Keywords: Blue green, algal extracts, antimicrobial assay, well diffusion.