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Germicidal Wipes Can Spread Bacteria

It's All in How You Swipe, Says Study Examining Antibacterial Products
WebMD Health News
Reviewed by Louise Chang, MD

June 3, 2008 -- Just how effective are those disinfecting wipes and hand sanitizers for preventing disease? Two newly reported studies that asked the question have come to different conclusions.

In a study that focused solely on wipes, researchers concluded that instead of preventing hospital-acquired infections like methicillin-resistant Staphylococcus aureus (MRSA) the wipes could actually be spreading bacteria when used improperly by hospital staffers.

But another study, reported Monday in the journal Pediatrics, suggests that frequent use of disinfecting wipes and hand sanitizers in the classroom can reduce school absenteeism caused by bacterial and viral illness.

Disinfecting wipes and alcohol-based hand gels are now widely used in hospitals, schools, and other public settings to kill the pathogens that cause infectious disease.

Americans now spend an estimated $1 billion a year on these and other antibacterial products, but their direct impact on the spread of infectious disease is not well understood.

(Do you use antibacterial wipes? Do you think they work? Why or why not? Talk with others on WebMD's Parenting: Preschoolers and Grade Schoolers board.)

Wipes Can Spread Bacteria

About 100,000 cases of invasive MRSA occur each year in the United States, according to the CDC, and the vast majority of these infections occur in hospitals and other health-care settings.

Disinfectant wipes are among the products used in such settings in an effort to prevent the spread of MRSA and other infectious pathogens.

But in a study presented today in Boston at the annual meeting of the American Society for Microbiology, researchers from Cardiff University's Welsh School of Pharmacy reported that when used improperly the wipes may spread bacteria rather than remove or kill them.

Researchers Jean-Yves Maillard, PhD, Gareth Williams, PhD, and colleagues observed hospital staffers as they used the wipes to disinfect hospital rooms.

"We saw that there was a tendency to use one wipe on consecutive surfaces, such as bed rails, computer monitors, and keyboards," Williams tells WebMD.

The researchers used the wipes in this way in laboratory tests designed to measure their ability to remove and kill the bacteria that cause staph infections, including MRSA.

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