The Effect of Silver Nanoparticles Produced from Lactobacillus plantarum Supernatant on Pathogenic Bacteria

The aim of this study was to investigate the effect of silver nanoparticles produced from Lactobacillus plantarum supernatant on pathogenic bacteria using supernatant of lactic acid bacteria obtained from the gastrointestinal tract of rainbow trout. The inhibitory effects of two concentrations (50 and 100 μl) of silver nanoparticles extracted from L. plantarum supernatant on Bacillus cereus in agar medium are significant (p<0.05). There is a significant difference between the treatments in terms of the number of B. cereus. Amikacin treatment had the highest number and silver nitrate and concentration of 50 silver nanoparticles had the lowest number of B.cereus. There is a significant difference between the treatments in terms of the number of Pseudomonas aeruginosa (p<0.05). The inhibitory effects of two concentrations of silver nanoparticles extracted from L. plantarum supernatant on Escherichia coli index indicator are significant in the diffusion method in the agar medium (p<0.05). There is a significant difference between the treatments in terms of the number of E.coli (p<0.05). Silver nanoparticles had the lowest number of E.coli. However, by reducing the density of silver nanoparticles to concentrations of 500 and 100 μg / ml, antibacterial activity against B.cereus and Ceracia marcensis, respectively, is observed. The average size of nanoparticles produced is between 25-45 nm and 80% of nanoparticles produced. They were in this range.