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

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.

Nanoparticles as Potential Novel Therapies for Urinary Tract Infections

Urinary tract infection (UTI) is one of the most common reasons for antibiotic treatment. Nevertheless, uropathogens are steadily becoming resistant to currently available therapies. In this context, nanotechnology emerges as an innovative and promising approach among diverse strategies currently under development. In this review we deeply discuss different nanoparticles (NPs) used in UTI treatment, including organic NPs, nanodiamonds, chemical and green synthesized inorganic NPs, and NPs made of composite materials. In addition, we compare the effects of different NPs against uropathogens in vivo and in vitro and discuss their potential impact the in the near future.