Antibacterial activity of Silver Nanoparticles Synthesized from Fusarium semitectum and Green Extracts

Biological synthesis of silver nanomaterials is an important aspect of nanotechnology today. The present study deals with the synthesis of silver nanoparticles employing Fusarium semitectum and leaf extracts of papaya, neem and parthenium. The formation of nanoparticles was monitored by UV-Vis spectral analysis. The synthesized silver nanoparticles were tested for antibacterial activity against selected pathogenic bacterial strains like Pseudomonas aeruginosa, Salmonella typhi, Staphylococcus aureus and Streptococcus pyogenes. The antibacterial activity of silver nanoparticles from F. semitectum and parthenium extract was highest against S. pyogenes followed by S. aureus, P. aeruginosa and S. typhi when compared to the reference drug. The antibacterial activity against Gram positive bacteria was comparatively better than against Gram negative bacteria. Application of silver nanoparticles in sewage treatment showed a significant decrease in the bacterial load. This effect was found to be concentration and time dependent.