An in Vitro Study on The Antimicrobial Activity and Antioxidant Activities of The Extract of A Seaweed, Enteromorpha Intestinalis Against Certain Pathogens
Abstract Seaweeds are potential bio resources of marine ecosystem and they are the producers of marine ecological energy chain and also possess many bioactive compounds with them. The seaweed Enteromorpha intestinalis is the plant material chosen for the study and was collected from the Pulicat estuary. The collected seaweeds were processed to synthesise nanoparticles out of them and the synthesised silver nanoparticle’s in vitro antimicrobial and antioxidant activity was evaluated. The antibacterial activity was determined by the action against Salmonella typhi, Pseudomonas aeruginosa, Staphylococcus aureus, Vibrio parahaemolyticus and Micrococcus luteus. Similarly the in vitro antifungal effect was also explored against Candida albicans, Trichoderma viridae, Aspergillus niger, Rizhopus sp and Penicillium notatum. Among them, Staphylococcus aureus and Aspergillus niger were found to be highly susceptible to the synthesised nanoparticles. When the antioxidant efficacy of synthesized nanoparticle was tested using different methods such as DPPH and ABTS it was observed that they possessed appreciable antioxidant property whose efficiency was correlated with their respective positive standards. These investigations illustrated the potential effects of the seaweed E. intestinalis for using them as an active antimicrobial and antioxidant agent.