Investigating the effect of silver nanoparticles synthesized using Sargassum angustifolium on the bacterial flora of common carp skin, Cyprinus carpio

 In this study, in order to investigate the antibacterial properties of silver nanoparticles that were synthesized using Sargassum seaweed extract by biological extracellular method, Mesophile Enterobacteriaceae, lactic acid bacteria and psychrophilic bacteria skin of common carp exposed to three concentration (0.11, 1.13, 5.67 mg/L AgNP) of this silver nanoparticles were studied for 14 days. The results showed that with increasing concentration of silver nanoparticles, the load of Enterobacteriaceae and Mesophile significantly reduced compared with control (p0.05). The lowest bacterial count was related to enterobacteria (log cfu/cm2 1.00±0.01), when exposed to concentration 1.13 mg/L AgNP. Lactic acid bacteria in all treatments and in control, did not grow until the last day of exposure.