Door Knobs As Antibacterials?
Metals like copper and silver have long been known to possess antibacterial properties. I learned this as an undergraduate microbiology major circa 1972. That said, I didn’t know whether to laugh or cry when I read an article in today’s NY Times entitled "Regulators Stamp Copper as a Germ Killer". According to the article, the Copper Development Association (CDA), a NY-based trade group for copper companies, announced that federal regulators at the US Environmental Protection Agency (EPA) approved its application to market copper, bronze and brass-containing products as antibacterials that are effective enough to protect against bacterial infection. Apparently, what made this newsworthy is that this is the first time that EPA has allowed health claims to be attached to a solid antimicrobial material (rather than an aerosol or liquid disinfectant). For those of you who may not know, EPA (not FDA) regulates antimicrobial agents like disinfectants and air fresheners that are not directly applied to the human body.
Not surprisingly, there are many consumer products already on the market which are impregnated with silver and some other antimicrobial substances that claim to reduce the risk of infection. Some of the more creative and pricey ones include silver-coated computer keyboards and mice manufactured by Iogear. However, none of the companies that manufacture these products can legally claim that the impregnated metals in them kill bacteria or provide a health benefit because they never thought to submit data to EPA regulators to substantiate these claims. This is marked contrast with the CDA which smartly and painstakingly performed “clinical studies” for the past 4 years with copper and its alloys (mostly door knobs) to gain regulatory approval to claim that these metals have bona fide antibacterial properties. According to a CDA spokesperson, additional “clinical trials are underway to test how copper bed rails, arm rests and other hospital fixtures can reduce the numbers of bacteria in hospitals.”
Don’t get me wrong–you gotta love the creativity of the CDA for developing an innovative business strategy to help maintain the price of copper and bolster the sales of copper-based products. As you may know, the advent of fiber optics and silicon chips has been steadily pushing the price of copper down for the past few years–something that the CDA is keenly aware of. Unfortunately, in contrast with CDA’s new vision, I believe that the only way to effectively reduce the high bacterial loads in our hospitals is through vigorous enforcement of hospital sanitation and hygiene programs, regular screening of hospital personnel and routine environmental monitoring. Based on over 30 of experience with food borne and nosocomial bacterial diseases, I firmly believe that improperly sterilized equipment and instruments and people who are either unsuspecting carriers or fail to maintain good sanitation and hygiene practices are the main causes of bacterial contamination and transmission in hospital settings. I don’t think that inanimate metal objects (which have long been known to have inherent antimicrobial properties) contribute to the high levels of bacteria that are commonly found in today’s hospitals. Nor do I think that replacing existing hospital fixtures with copper, brass or bronze ones will do much to reduce bacteria levels in most hospitals. Nice try CDA–but no cigar this time (at least not from me)!
Until next time….
Good Luck and Good Job Hunting!!!!!!!
