Antibacterial activity of Spirulina platensis grown using Sargassum wightii as a fertilizer medium

Sinthiya | Selvin Samuel       

Spirulina platensis |  Antibacterial activity

Vol: 3; Iss: 10; Oct 17 | ISSN: 2454-5422

Spirulina platensis, a blue green alga is an edible, microscopic, multicellular cyanobacterium, attracted attention to many scientists due to its beneficial medicinal applications. S.platensis or its extracts are having several biological activities like anticancer, antiviral, antioxidant and antimicrobial activities.In the present study, antibacterial activity of S. supplemented S. platensis solvent extracts was investigated against pathogenic bacteria. The antibacterial effect of ethanol, methanol, petroleum ether and extract of S.platensis showed the antibacterial activities against different bacterial strains (Klebsiella pneumoniae, Escherichia coli, Staphylococcus aureus, Salmonella typhi, Bacillus cereus) were tested, using disc diffusion method. Methanolic extract of Spirulina platensis showed maximum antibacterial activity of 15mm against E. coli and a minimum activity of 9.0mm against S.aureus. Ethanolic extract of Spirulina platensis also showed the highest biological activity of 13mm against Klebsiella pneumoniae, minimum ctivity of 9.0 mm against S.aureus. The finding in this study reveals that antimicrobial activity of Spirulina platensis was highly effective in methanol the rest of the solvents showed varying degree of inhibition. Spirulina platensis showed maximum zone of inhibition against all the bacterial isolates.