The Study of the Antimicrobial Properties of Selected Engineering Materials’ Surfaces
- 1 Department of Chemical, Metallurgical and Materials Engineering, Tshwane University of Technology, Pretoria, South Africa
- 2 Department of Metallurgical and Materials Engineering, University of Lagos, Lagos, Nigeria
- 3 Department of Chemical, Metallurgical and Materials Engineering, Tshwane University of Technology, Pretoria, South Africa
- 4 Deparment of Cell Biology and Genetics, University of Lagos, Lagos, Nigeria
- 5 Department of Metallurgical and Materials Engineering, University of Lagos, Lagos, Nigeria
- 6 Department of Metallurgical and Materials Engineering, University of Lagos, Lagos, Nigeria
Abstract
This paper studies the antimicrobial activity of selected engineering materials surfaces at room and chill temperatures. The antimicrobial effects of selected materials surfaces were evaluated by dropping the test pieces into prepared cultures of Bacillus spp, Escherichia coli , and Staphylococcus aereus isolated from fruits, animal feaces and natural environment respectively. Bacteria count obtained after 0, 30, 60, 90, 120, 180, 240 and 300 minutes at room temperature and chill condition was taken and compared with their initial count. The amount of live bacteria drops by several orders of magnitude, to zero, on metallic copper and brass within 30 to 300 minutes in both room and chill conditions. In contrast, no reduction is seen in the number of colonies of live bacteria on plastics, ceramic and stainless steel in both room and chill conditions. These results suggest that the selection of metallic copper and brass for touch surfaces in hospitals, surfaces exposed to fruit processing and household utensils can materially assist in reducing bacterial contamination, which should lead to a reduction in the transmission of infectious organisms.
- Michels, H.T., Wilks, S.A., Noyce, J.O. and Keevil, C.W. (2005) Copper Alloys for Human Infectious Disease Control. Proceedings Materials Science and Technology Conference, Pittsburgh, 25-28 September 2005.
- Muller, F.L., Lustgarten, M.S., Jang, Y., Richardson, A. and Van Remmen, H. (2007) Trends in Oxidative Aging Theories. Free Radical Biology and Medicine, 43, 477-503. http://dx.doi.org/10.1016/j.freeradbiomed.2007.03.034
- Figueroa, G., Troncoso, M., Toledo, M., Lopez, C. and Lemus, S. (1998) Jejuni and Salmonella spp. in Broilers. Institute of Child Health, Cape Town, 373-376.
- Domek, M.J., Robbins, J.E., Anderson, M.E. and McFeters, G.A. (1987) Metabolism of Escherichia coli Injured by Copper. Canadian Journal of Microbiology, 33, 57-62. http://dx.doi.org/10.1139/m87-010
- Cooney, T.E. (1995) Infection Control Hospital Epidemiol. Bactericidal Activity of Copper and Non-Copper Paint. 16th Edition, The University of Chicago Press, Chicago, 444.
- Wells, F. (2007) Preventive Veterinary Medicine. Midwest Resistance to Infection, 79, 204-223.
- Wilks, S.A., Michels, H. and Keevil, C.W. (2005) The Survival of Escherichia coli O157 on a Range of Metal Surfaces. International Journal of Food Microbiology, 105, 445-454. http://dx.doi.org/10.1016/j.ijfoodmicro.2005.04.021
- Higgins, R.A. (1992) Materials for Engineering Technician. 5th Edition, Hodder and Strughton, London.
- Block, S.S. (2001) Disinfection, Sterilization and Preservation. 9th Edition, Lippincott Williams Wilkins, Weston, 1857.
- Dollwet, H.H.A. and Sorenson, J.R.J. (2001) Historic Uses of Copper Compounds in Medicine. Trace Elements in Medicine. 2nd Edition, The Humana Press Inc., Arkansas, 80-87.
- Kuhn, P.J. (1983) Doorknobs: A Source of Nosocomical Infections. Diagnostic Medicine. Medical Economics Co., Montvale.
- Sullivan, D. and Carpenter, D. (1993) Method of Analysis for Nutrition Labeling. AOAC International, Arlington.
- Milligan, A.M., Wilson, M. and Knowles, J.C. (2003) The Effect of Increasing Copper Content in Phosphate-Based Glasses on Biofilms of Streptococcus sanguis. Biomaterials, 24, 1797. http://dx.doi.org/10.1016/S0142-9612(02)00577-X
- Mehtar, S., Wild, I. and Todorov, S.D. (2008) The Antimicrobial of Copper and Copper Alloys against Nosocomial Pathogens and Mycobacterium Tuberculosis Isolated from Healthcare Facility in the Western Cape: An in-vitro Study. Journal of Hospital Infection, 68, 45.