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Article Abstract
Background: Copper has a bactericidal activity against a series of bacterial strains.
Aim: To measure resistance to bacterial adherence of copper (Cu) and stainless steel (SS) metal coupons.
Material And Methods: Bacterial strains causing nosocomial infections in Chile were analyzed. Bacterial adherence was studied using a previously described method based on a system of metal coupons that are immersed in culture media containing the bacteria of interest at room temperature.
Results: Adherence to Cu and SS coupons was different for Methicillin-resistant Staphylococcus aureus (MRSA), Klebsiella pneumoniae and Acinetobacter baumannii strains. For these strains, no adherence to Cu coupons occurred during the 48 h observation period compared to a rapidly increasing adherence to SS coupons, with a final colony count of 1.00 E + 07 cfu/mL. For two different Pseudomonas aeruginosa clinical strains, inhibition of adherence was not observed on Cu coupons, and colony counts were similar for Cu and SS using the standard inoculum (2-3 x lO7 cfu).A partial decrease in adherence was observed for Cu but not for SS coupons, when a lower inoculum was used.
Conclusions: Copper surfaces represent an interesting option to reduce bacterial contamination in the hospital environment due to its resistance to bacterial adhesión of most of the common nosocomial bacterial strains.
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| http://dx.doi.org/10.4067/S0034-98872013000300002 | DOI Listing |
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