FIG 3.
Antibacterial activities of two wound dressings with different copper concentrations against MRSA. Methicillin-resistant Staphylococcus aureus (MRSA) (NC 11939-09) was prepared to approximately 106 CFU/ml in 0.85% NaCl. For each sample of wound dressing, five replicate test pieces were inoculated on the wound-facing surface with an appropriate volume of MRSA. The inoculates were held for 24 h at 24°C ± 1°C at >95% humidity. A significant log reduction was observed for both copper dressings, and an increased log reduction was observed with an increased copper concentration.