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Current Microbiology

, Volume 71, Issue 2, pp 291–295 | Cite as

Antimicrobial Activity of Copper Alloys Against Invasive Multidrug-Resistant Nosocomial Pathogens

  • Ozgen Koseoglu Eser
  • Alper Ergin
  • Gulsen Hascelik
Article

Abstract

The emergence and spread of antibiotic resistance demanded novel approaches for the prevention of nosocomial infections, and metallic copper surfaces have been suggested as an alternative for the control of multidrug-resistant (MDR) bacteria in surfaces in the hospital environment. This study aimed to evaluate the antimicrobial activity of copper material for invasive MDR nosocomial pathogens isolated over time, in comparison to stainless steel. Clinical isolates of methicillin-resistant Staphylococcus aureus (MRSA) (n:4), OXA-23 and OXA-58 positive, MDR Acinetobacter baumannii (n:6) and Pseudomonas aeruginosa (n:4) were evaluated. The antimicrobial activity of coupons containing 99 % copper and a brass alloy containing 63 % copper was assessed against stainless steel. All the materials demonstrated statistically significant differences within each other for the logarithmic reduction of microorganisms. Among the three materials, the highest reduction of microorganisms was seen in 99 % copper and the least in stainless steel. The result was statistically significant especially for 0, 2, and 4 h (P = 0.05). 99 % copper showed a bactericidal effect at less than 1 h for MRSA and at 2 h for P. aeruginosa. 63 % copper showed a bactericidal effect at 24 h for P. aeruginosa strains only. Stainless steel surfaces exhibited a bacteriostatic effect after 6 h for P. aeruginosa strains only. 99 % copper reduced the number of bacteria used significantly, produced a bactericidal effect and was more effective than 63 % copper. The use of metallic copper material could aid in reducing the concentration of bacteria, especially for invasive nosocomial pathogens on hard surfaces in the hospital environment.

Keywords

Copper Alloy Bactericidal Effect Colistin Acinetobacter Baumannii Hospital Environment 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

This study was presented in the 114th General Meeting of the American Society for Microbiology, May 17–20, 2014, Boston, Massachusetts, USA. We would like to thank Selçuk Korkmaz (Hacettepe University, Department of Biostatistics) for interpreting the statistical analysis of the data and Tülay Özçelik for technical assistance.

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • Ozgen Koseoglu Eser
    • 1
  • Alper Ergin
    • 2
  • Gulsen Hascelik
    • 1
  1. 1.Department of Medical Microbiology, Faculty of MedicineHacettepe UniversityAnkaraTurkey
  2. 2.School of Health ServicesHacettepe UniversityAnkaraTurkey

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