Gold-, silver- and magnesium-doped zinc oxide nanoparticles prevents the formation of and eradicates bacterial biofilms

Abstract

Aim: This work aimed to synthesize magnesium-doped zinc oxide, silver and gold nanoparticles (Nps) and to evaluate their potential to prevent and eradicate Escherichia coli, Proteus mirabilis, Staphylococcus aureus, Acinetobacter baumannii and Pseudomonas aeruginosa biofilms. Materials & methods: The Nps were synthesized by precipitation and metallic reduction techniques. Physicochemical and biological characterization of Nps was performed. Results: All the Nps tested were able to inhibit the formation of E. coli, P. mirabilis, S. aureus and A. baumannii biofilms. The effects on the eradication of preformed biofilms were variable, although all the Nps tested were able to eradicate A. baumannii biofilms. Conclusion: The observed effects make the Nps suitable for coating surfaces and/or antibiotic carriers with medical interest.