Evaluating Anti-Bacterial Effect of Doped Silver Nanoparticles on Iron Oxide Nanocrystal in Staphylococcus Epidermidis Isolated from Nosocomial Infection

Staphylococcus epidermidis is an opportunistic pathogen and of the most important cause of infectious diseases. The prevalence of these infections, as well as the increase of antibiotic-resistant species, has become a solicitous issue. Using nanoparticles to combat bacterial infections can replace antibiotics. In this study, the antibacterial properties of doped silver nanoparticles on Iron oxide nanocrystal on isolated Staphylococcus epidermidis bacteria from nosocomial infection was studied.

Firstly, Nanoparticles were prepared by chemical co-precipitation method and were prepared at concentrations of 0, 20, 40, 60, 80 and 100 ppm to determine bactericidal properties. The effect of nanoparticles on isolated and standard strains of Staphylococcus epidermidis at 24, 48 and 72 hours were investigated by microplate titer. Data were analyzed by SPSS -18 software at a 0.01 margin of error.

The results showed that time, bacterial type and concentration factors had a significant effect on the growth inhibition of Staphylococcus epidermidis, though the concentration and type of bacterial variables had more significant effects. The most antibacterial effect of doped silver nanoparticles on iron oxide nanocrystals was at 100ppm concentration over a 48-hour time on standard isolate.

Doped Silver nanoparticles on Iron nanocrystals affect the growth of Staphylococcus epidermidis and reduce its growth rate. This effect, in comparison to the effects of silver nanoparticles in a single state, which has already been investigated by researchers, is far more advanced and the combination of Metal nanoparticles together cause to improve their effectiveness.