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A. Roguska, A. Belcarz, P. Suchecki, M. Andrzejczuk and M. Lewandowska

Abstract

Problem of post-operative infections of implant materials caused by bacterial adhesion to their surfaces is very serious. Enhancement of antibacterial properties is potentially beneficial for biomaterials value. Therefore, the metallic and metallic oxide nanoparticles attract particular attention as antimicrobial factors. The aim of this work was to create nanotubular (NT) oxide layers on Ti with the addition of ZnO nanoparticles, designed for antibacterial biomedical coatings. Antimicrobial activities of titanium, TiO2 NT and ZnO/TiO2 NT surfaces were evaluated against bacterial strain typical for orthopaedic infections: S. epidermidis. TiO2 NT alone killed the free bacterial cells significantly but promoted their adhesion to the surfaces. The presence of moderate amount of ZnO nanoparticles significantly reduced the S. epidermidis cells adhesion and viability of bacterial cells in contact with modified surfaces. However, higher amount of loaded nanoZnO showed the reduced antimicrobial properties than the medium amount, suggesting the overdose effect.

Open access

A. Roguska, A. Belcarz, P. Suchecki, M. Andrzejczuk and M. Lewandowska

Problem of Post-operative infections of implant materials caused by bacterial adhesion to their surfaces is very serious. Enhancement of antibacterial properties is potentially beneficial for biomaterials value. Therefore, the metallic and metallic oxide nanoparticles attract particular attention as antimicrobial factors. The aim of this work was to create nanotubular (NT) oxide layers on Ti with the addition of ZnO nanoparticles, designed for antibacterial biomedical coatings. Antimicrobial activities of titanium, TiO2 NT and ZnO/TiO2 NT surfaces were evaluated against bacterial strain typical for orthopaedic infections: S. epidermidis. TiO2 NT alone killed the free bacterial cells significantly but promoted their adhesion to the surfaces. The presence of moderate amount of ZnO nanoparticles significantly reduced the S. epidermidis cells adhesion and viability of bacterial cells in contact with modified surfaces. However, higher amount of loaded nanoZnO showed the reduced antimicrobial properties than the medium amount, suggesting the overdose effect.

Open access

Nazime Mercan Dogan, Tugba Sensoy, Gulumser Acar Doganli, Naime Nur Bozbeyoglu, Dicle Arar, Hatice Ardag Akdogan and Merve Canpolat

biosynthesis using immobilized mycelium of Aspergillus niger, World Journal of Microbiology and Biotechnology , 7, pp. 379–84. Harshad, S.L., Tatoba, R.W., Avinash, A.K. & Sanjay, P.G. (2012). Enhanced biodegradation and detoxification of disperse azo dye Rubine GFL and textile industry effluent by defined fungal-bacterial consortium, International Biodeterioration & Biodegradation, 72, pp. 94–107. Joseph, B., Ramteke, P.W. & Kumar, P.A. (2006). Studies on the enhanced production of extracellular lipase by Staphylococcus epidermidis, Journal of General and

Open access

Shakeel Ahmed Ansari, Mohammad Oves, Rukhsana Satar, Anish Khan, Syed Ismail Ahmad, Mohammad Alam Jafri, Syed Kashif Zaidi and Mohammad Husein Alqahtani

biofilm formation by Pseudomonas aeruginosa and Staphylococcus epidermidis . Coll. Surf. B: Biointerf. 79(2), 340–344. DOI: 10.1016/j.colsurfb.2010.04.014. 6. Mihu, M.R., Sandkovsky, U., Han, G., Friedman, J.M., Nosanchuk, J.D. & Martinez, L.R. (2010). The use of nitric oxide releasing nanoparticles as a treatment against Acinetobacter baumannii in wound infections. Virulence 1(2), 62–67. DOI: 10.4161/viru.1.2.10038. 7. Satar, R., Syed, I.A., Rasool, M., Pushparaj, P.N. & Ansari, S.A. (2016). Investigating the antibacterial potential of agarose