Bacterial infections are common and challenging to treat due to increasing antibiotic resistance. Research has focused on using various nanoparticles, with studies showing that Selenium Nanoparticles (Se-NPs) have antibacterial effects. This study focuses on the biosynthesis and characterization of Se-NPs using Pseudomonas aeruginosa and Bacillus pumilus RMO6. Bacteria were cultivated on the microbial culture media, followed by the synthesis of Se-NPs through the reduction of sodium selenite in the bacterial supernatant. Characterization techniques, including UV-Vis spectroscopy, FT-IR, XRD, TEM imaging, and DLS, confirmed the successful formation of Se-NPs, revealing their size, morphology, and surface properties. The Biosynthesized nanoparticles exhibited significant antimicrobial activity against four standard bacterial strains: Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, and Enterococcus faecalis. Notably, Se-NPs synthesized by Bacillus pumilus demonstrated a significantly lower MIC and greater effectiveness in biofilm eradication (MBEC) compared to those produced by Pseudomonas aeruginosa, with a fourfold reduction in MIC against Escherichia coli and Staphylococcus aureus. These findings highlight the potential of Se-NPs as effective agents in combating resistant bacterial infections and suggest their promising application in medical treatments.
Heidari et al. (Thu,) studied this question.