A new study by scientists at the University of Southampton suggests that MRSA contamination can be reduced by using copper alloys for surfaces in healthcare facilities.
Methicillin resistant Staphylococcus aureus (MRSA) is a virulent organism, essentially resistant to all beta-lactam antibiotics (for example: penicillins, ampicillins, cephalosporins). It can cause skin, bone and life-threatening blood infections, as well as pneumonia.
In a study co-funded by the International Copper Association and Copper Development Association Inc., New York, Professor Bill Keevil, Head of the Environmental Healthcare Unit in the University of Southampton's School of Biological Sciences, and Dr Jonathan Noyce examined the survival rates of the organism on stainless steel, the most commonly used metal in healthcare facilities, and on selected copper alloys.
Their findings, which were reported recently at a meeting of the American Society for Microbiology in New Orleans, showed that at room temperature, MRSA was able to persist and remain viable in dried deposits on stainless steel for periods up to 72 hours.
For copper alloys containing 55 per cent, 80 per cent, and 99 per cent copper, significant reductions in viability were achieved after four and a half hours, three hours, and one and a half hours, respectively. Yellow brass rendered the bacteria completely inviable after 270 minutes, while the high-copper alloy took only 90 minutes.