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Antimicrobial Ball Chain

The Sturge Group is pleased to announce the introduction of the Sturge 29+Gold and Sturge 29+Silver ranges of infection control ball chains, made from solid antimicrobial copper.

Sturge 29+ is a range of antimicrobial ball chains developed by Sturge Industries, based on copper and its alloys.

With the emergence of SARS-CoV-2, it has never been more important to break the chain of microbial infection. Touch surface contamination has recently been found to have a higher impact on the spread of infectious disease than previously thought1. It has been shown that coronaviruses, including SARS-CoV-2, remain infectious on many touch surfaces (including glass, PVC and stainless steel) for up to five days, depending on the viral load2,3. In contrast, inactivation begins in as little as 40 minutes on copper and copper alloy surfaces2,3.

Although the inactivation of viruses on copper surfaces has not been robustly studied, there are multiple reports of irreversible destruction of viral particles4. Since the external structure is mostly conserved between different types of coronavirus, there is a low probability of resistance4. In studies with E. coli, destruction of both the cell membrane and genomic DNA was witnessed for high copper alloys, but in alloys of up to 60% the genomic DNA remained intact, suggesting the method of cell death is degradation of the cell membrane5.

For further information and discussion as to how we can best meet your requirements, please contact us by email at or telephone on 01384 455426.

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      1 – Otter JA, Yezli S, Salkeld JAG, French GL. 2013. Evidence that contaminated surfaces contribute to the transmission of hospital pathogens and an overview of strategies to address contaminated surfaces in hospital settings. Am J Infect Control 41:S6 –S11. j.ajic.2012.12.004

      2 – S.L. Warnes, Z.R. Little, and C.W. Keevil, Human Coronavirus 229E Remains Infectious on Common Touch Surface Materials, mBio, American Soc. Microbiology, Vol 6, e01697-15, 2015

      3 – N. van Doremalen, T. Bushmaker, D.H. Morris, M.G. Holbrook, A. Gamble, B.N. Williamson, A. Tamin, J.L. Harcourt, N.J. Thornburg, S.I. Gerber, J.O. LloydSmith, E. de Wit, and V.J. Munster, Aerosol and Surface Stability of SARSCoV-2 as Compared with SARS-CoV-1, N. Engl. Jour. Med, 2020, DOI: 10.1056/ NEJMc2004973.

      4 – H.T Michels Can Copper Help Fight Covid-19, Advanced Materials & Processes 2020

      5 – R. Hong, T.Y. Kang, C.A. Michels, and N. Gadura, Membrane Lipid Peroxidation in Copper Alloy-Mediated Contact Killing of Escherichia coli, Appl. Environ. Microbiol., Vol 78, p 1776-1784, 2012.