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The Antimicrobial Efficacy of Copper Alloy Furnishing in the Clinical Environment: A Crossover Study

  • T. J. Karpanen (a1), A. L. Casey (a1), P. A. Lambert (a2), B. D. Cookson (a3), P. Nightingale (a4), L. Miruszenko (a5) and T. S. J. Elliott (a5)...
Abstract
Objective.

To determine whether copper incorporated into hospital ward furnishings and equipment can reduce their surface microbial load.

Design.

A crossover study.

Setting.

Acute care medical ward with 19 beds at a large university hospital.

Methods.

Fourteen types of frequent-touch items made of copper alloy were installed in various locations on an acute care medical ward. These included door handles and push plates, toilet seats and flush handles, grab rails, light switches and pull cord toggles, sockets, overbed tables, dressing trolleys, commodes, taps, and sink fittings. Their surfaces and those of equivalent standard items on the same ward were sampled once weekly for 24 weeks. The copper and standard items were switched over after 12 weeks of sampling to reduce bias in usage patterns. The total aerobic microbial counts and the presence of indicator microorganisms were determined.

Results.

Eight of the 14 copper item types had microbial counts on their surfaces that were significantly lower than counts on standard materials. The other 6 copper item types had reduced microbial numbers on their surfaces, compared with microbial counts on standard items, but the reduction did not reach statistical significance. Indicator microorganisms were recovered from both types of surfaces; however, significantly fewer copper surfaces were contaminated with vancomycin-resistant enterococci, methicillin-susceptible Staphylococcus aureus, and coliforms, compared with standard surfaces.

Conclusions.

Copper alloys (greater than or equal to 58% copper), when incorporated into various hospital furnishings and fittings, reduce the surface microorganisms. The use of copper in combination with optimal infection-prevention strategies may therefore further reduce the risk that patients will acquire infection in healthcare environments.

Infect Control Hosp Epidemiol 2012;33(1):3-9

Copyright
Corresponding author
Corporate Division, Queen Elizabeth Hospital, University Hospitals Birmingham National Health Service Foundation Trust, Edgbaston, Birmingham B15 2TH, United Kingdom (tom.elliott@uhb.nhs.uk)
References
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1. Allegranzi, B, Storr, J, Dziekan, G, Leotsakos, A, Donaldson, L, Pittet, D. The first global patient safety challenge “clean care is safer care”: from launch to current progress and achievements. J Hosp Infect 2007;65(suppl 2):115123.
2. UK Department of Health. Winning ways: working together to reduce healthcare associated infection in England. http://www.dh.gov.uk/en/Publicationsandstatistics/Publications/PublicationsPolicyAndGuidance/DH_4064682. 2003. Accessed January 15, 2011.
3. Pratt, RJ, Pellowe, CM, Wilson, JA, et al. Epic2: national evidence-based guidelines for preventing healthcare-associated infections in NHS hospitals in England. J Hosp Infect 2007;65(suppl 1):S1S64.
4. Boyce, JM. Environmental contamination makes an important contribution to hospital infection. J Hosp Infect 2007;65(suppl 2):5054.
5. Carling, PC, Bartley, JM. Evaluating hygienic cleaning in health care settings: what you do not know can harm your patients. Am J Infect Control 2010;38:S41S50.
6. Dancer, SJ. The role of environmental cleaning in the control of hospital-acquired infection. J Hosp Infect 2009;73:378385.
7. Gould, DJ, Moralejo, D, Drey, N, Chudleigh, JH. Interventions to improve hand hygiene compliance in patient care. Cochrane Database Syst Rev 2010:CD005186.
8. Scheithauer, S, Oberrohrmann, A, Haefner, H, et al. Compliance with hand hygiene in patients with methicillin-resistant Staphylococcus aureus and extended-spectrum β-lactamase-producing enterobacteria. J Hosp Infect 2010;76:320323.
9. Hardy, KJ, Gossain, S, Henderson, N, et al. Rapid recontamination with MRSA of the environment of an intensive care unit after decontamination with hydrogen peroxide vapour. J Hosp Infect 2007;66:360368.
10. Taylor, L, Phillips, P, Hastings, R. Reduction of bacterial contamination in a healthcare environment by silver antimicrobial technology. J Infect Prevent 2009;10:612.
11. Dollwet, HH, Sorenson, JRJ. Historic uses of copper compounds in medicine. Trace Elem Med 1985;2:8087.
12. Grass, G, Rensing, C, Solioz, M. Metallic copper as an antimicrobial surface. Appl Environ Microbiol 2011;77(5):15411547.
13. Santo, CE, Lam, EW, Elowsky, CG, et al. Bacterial killing by dry metallic copper surfaces. Appl Environ Microbiol 2011;77:794802.
14. Weaver, L, Noyce, JO, Michels, HT, Keevil, CW. Potential action of copper surfaces on methicillin-resistant Staphylococcus aureus . J Appl Microbiol 2010;109:22002205.
15. Santo, CE, Morais, PV, Grass, G. Isolation and characterization of bacteria resistant to metallic copper surfaces. Appl Environ Microbiol 2010;76:13411348.
16. Santo, EC, Taudte, N, Nies, DH, Grass, G. Contribution of copper ion resistance to survival of Escherichia coli on metallic copper surfaces. Appl Environ Microbiol 2008;74:977986.
17. US Environmental Protection Agency. US Environmental Protection Agency (EPA) registers copper-containing alloy products. http://www.epa.gov/pesticides/factsheets/copper-alloy-products.htm. 2008. Accessed January 17, 2011.
18. Casey, AL, Adams, D, Karpanen, TJ, et al. Role of copper in reducing hospital environment contamination. J Hosp Infect 2010;74:7277.
19. Marais, F, Mehtar, S, Chalkley, L. Antimicrobial efficacy of copper touch surfaces in reducing environmental bioburden in a South African community healthcare facility. J Hosp Infect 2010;74:8082.
20. Mikolay, A, Huggett, S, Tikana, L, Grass, G, Braun, J, Nies, DH. Survival of bacteria on metallic copper surfaces in a hospital trial. Appl Microbiol Biotechnol 2010;87:18751879.
21. Wheeldon, LJ, Worthington, T, Lambert, PA, Hilton, AC, Lowden, CJ, Elliott, TS. Antimicrobial efficacy of copper surfaces against spores and vegetative cells of Clostridium difficile, the germination theory. J Antimicrob Chemother 2008;62:522525.
22. Carling, PC, Von Beheren, S, Kim, P, Woods, C. Intensive care unit environmental cleaning: an evaluation in sixteen hospitals using a novel assessment tool. J Hosp Infect 2008;68:3944.
23. Hota, S, Hirji, Z, Stockton, K, et al. Outbreak of multidrug-resistant Pseudomonas aeruginosa colonization and infection secondary to imperfect intensive care unit room design. Infect Control Hosp Epidemiol 2009;30:2533.
24. La Forgia, C, Franke, J, Hacek, DM, Thomson, RB Jr, Robicsek, A, Peterson, LR. Management of a multidrug-resistant Acinetobacter baumannii outbreak in an intensive care unit using novel environmental disinfection: a 38-month report. Am J Infect Control 2010;38:259263.
25. Michels, HT, Noyce, JP, Wilks, SA, Keevil, CW. Copper alloys for human infectious disease control. In: Program and abstracts of the Materials Science and Technology Conference. Pittsburgh, PA: 2005.
26. Hirsch, BE, Attaway, H, Nadan, R, et al. Copper surfaces reduce microbial burden in out-patient infectious disease practice. In: Program and abstracts of the Interscience Conference on Antimicrobial Agents and Chemotherapy (ICAAC). Boston, MA: American Society for Microbiology, 2010.
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Infection Control & Hospital Epidemiology
  • ISSN: 0899-823X
  • EISSN: 1559-6834
  • URL: /core/journals/infection-control-and-hospital-epidemiology
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