Maryam Zobeidy nezhad; Mostafa Ghaffari; Ali Taheri
Volume 7, Issue 1 , September 2018, , Pages 17-25
Abstract
Abstract Nowadays due to the emergence of resistant forms of pathogenic bacteria, discovering new antimicrobial substances from marine natural resources is considered very important. This study aims to investigate the antibacterial activity of methanolic extract of brown algae against some Gram negative ...
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Abstract Nowadays due to the emergence of resistant forms of pathogenic bacteria, discovering new antimicrobial substances from marine natural resources is considered very important. This study aims to investigate the antibacterial activity of methanolic extract of brown algae against some Gram negative bacteria. After sampling and transferring the samples to the laboratory, algae samples were washed, dried and pulverized; then, the extraction was conducted using methanol solvent. Methanolic extracts of algae (padina gymnospora) were prepared in four concentrations of 10 to 80 mg/ml and were tested against 4 strains of Gram negative bacteria Vibrio cholerae, Morganella morganii, Proteus mirabilisand Proteus vulgaris using disc diffusion technique and inhibition growth zone measurement. The results revealed that P. vulgaris, with growth inhibition zone diameter of 11.23±0.25 mm in 80 mg/ml concentration, showed the maximum sensitivity to algae extract. This value had a significant difference compared to reference antibiotics of gentamycin and neomycin and all other concentrations (ppadina gymnospora, can be considered a potential resource of antimicrobial compounds aiming to replace chemical medicines.
