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Investigation of Nanoparticle Metallic Core Antibacterial Activity: Gold and Silver Nanoparticles against Escherichia coli and Staphylococcus aureus
| Content Provider | MDPI |
|---|---|
| Author | Gouyau, Jimmy Duval, Raphaël Boudier, Ariane Lamouroux, Emmanuel |
| Copyright Year | 2021 |
| Description | Multidrug-resistant (MDR) bacteria constitute a global health issue. Over the past ten years, interest in nanoparticles, particularly metallic ones, has grown as potential antibacterial candidates. However, as there is no consensus about the procedure to characterize the metallic nanoparticles (MNPs; i.e., metallic aggregates) and evaluate their antibacterial activity, it is impossible to conclude about their real effectiveness as a new antibacterial agent. To give part of the answer to this question, 12 nm gold and silver nanoparticles have been prepared by a chemical approach. After their characterization by transmission electronic microscopy (TEM), Dynamic Light Scattering (DLS), and UltraViolet-visible (UV-vis) spectroscopy, their surface accessibility was tested through the catalytic reduction of the 4-nitrophenol, and their stability in bacterial culture medium was studied. Finally, the antibacterial activities of 12 nm gold and silver nanoparticles facing Staphylococcus aureus and Escherichia coli have been evaluated using the broth microdilution method. The results show that gold nanoparticles have a weak antibacterial activity (i.e., slight inhibition of bacterial growth) against the two bacteria tested. In contrast, silver nanoparticles have no activity on S. aureus but demonstrate a high antibacterial activity against Escherichia coli, with a minimum inhibitory concentration of 128 µmol/L. This high antibacterial activity is also maintained against two MDR-E. coli strains. |
| Starting Page | 1905 |
| e-ISSN | 14220067 |
| DOI | 10.3390/ijms22041905 |
| Journal | International Journal of Molecular Sciences |
| Issue Number | 4 |
| Volume Number | 22 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-02-14 |
| Access Restriction | Open |
| Subject Keyword | International Journal of Molecular Sciences Spectroscopy Metallic Nanoparticles Silver Gold Synthesis Characterization Surface Reactivity Stability Antibacterial Activity Escherichia Coli Staphylococcus Aureus Multidrug Resistant Bacteria |
| Content Type | Text |
| Resource Type | Article |
