The Phenolic Contents and Antimicrobial Activities of Some Marine Algae from the Mediterranean Sea (Algeria)

In this study, three marine algae collected from western coast of algerian mediteranean sea ( Ulva lactuca, Dictyota dichotoma , and Corallina elongata ) were tested using the agar-well diffusion method for their production of antibacterial and antifungal agents on various organisms that cause diseases of humans and plants ( Eschirichia coli ATCC 25922, Staphylococcus aureus ATCC 25923, Salmonella sp, Candida albicans , and Penicillium sp.). The total phenol content and antimicrobial activity were determined using different crude seaweeds extracts (methanol, diethylether, and chloroform). The results show that the chloroform extracts of ( Ulva lactuca and Corallina elongata ) had the highest activity against E. coli and Salmonella sp. The methanol extract obtained from ( Ulva lactuca, Dictyota dichotoma , and Corallina elongata ) showed antifungal activity for Candida albicans . The results of the study revealed that the seaweeds from Algeria appear to have immense potential as a source of antibacterial and antifungal compounds; they can be used in treating diseases caused by these organisms.