Abstract:
Ethanolic crude extracts from seven marine algal species belong to Clorophyceae (Cladophora glomerata, Enteromorpha linza, Ulva rigida), Phaeophyceae (Cystoseira barbata, Padina pavonica) and Rhodophyceae (Corallina officinalis, Ceramium ciliatum) from the coast of Vona, Turkey were evaluated in vitro for the antibacterial and antifungal activity of six bacteria and two fungus with the paper disc agar diffusion methods. The marine algae analysed of Cladophora glomerata and Padina pavonica were the species with the strongest activities against the broadest spectrum of test organisms. In particular, Enteromorpha linza and Padina pavonica showed the highest antifungal activity against Aspergillus niger, while Cladophora glomerata showed the highest antibacterial activity against Staphylococcus aureus. On the other hand, it was found that extracts of all marine algae were significant antimicrobial activity against Staphylococcus aureus, Salmonella typhimurium and Aspergillus niger. The minimal inhibition concentrations (MIC) of the crude extract obtained from Enteromorpha linza and Padina pavonica ranged from 2.5 to 10 mg/ml and 1.25 to 10 mg/ml, respectively.