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Antibacterial Soaps Reduce Food-borne Illness Risk

April 17, 2014

A significant reduction in the presence of Shigella is reported.

The use of antibacterial soaps can reduce the spread of harmful bacteria, which can lead to food-borne illness, more effectively than using non-antibacterial soaps, according to research published in the peer-reviewed Journal of Food Protection (Vol. 77, No. 4, 2014, pp. 574-582). The study used new laboratory data, together with simulation techniques, to compare the ability of non-antibacterial and antibacterial products to reduce the risk of the infectious disease shigellosis, which is often spread during food preparation. The study was funded by the American Cleaning Institute and the Personal Care Product Council.

Lead researcher Donald Schaffner of Rutgers University’s Department of Food Science says the data show that the use of three antibacterial wash products result in a statistically significant reduction in the presence of Shigella (the bacterium that causes shigellosis) compared to the use of the non-antibacterial soaps.

“This exciting research blends quantitative microbial risk assessments with an impressive set of laboratory data to show that antibacterial treatments are more effective than non-antibacterial treatments in reducing disease,” said Dr. Schaffner.

In the study, 163 subjects were used to compare two non-antibacterial products and three antibacterial products, with a study design intended to simulate food handling.  The participants’ hands were exposed to Shigella and then treated with one of the five products before handling melon balls. The resulting levels of Shigella on the food were then measured.

The levels of Shigella were then used to predict the outcome from an event in which 100 people would be exposed to Shigella from melon balls that had been handled by food workers with Shigella on their hands.

The data show all three antibacterial treatments significantly lowered the concentration of Shigella compared to the non-antibacterial treatments. Based on this model, the paper predicted that by washing with the antibacterial treatments, the number of illnesses could be reduced tenfold.

“This research provides strong evidence that antibacterial soaps are significantly more effective than non-antibacterial soaps in reducing Shigella on the hands and its subsequent transfer to ready-to-eat foods,” the authors write.

Click here to view an abstract summarizing the paper, “Quantitative Microbial Risk Assessment of Antibacterial Hand Hygiene Products on Risk of Shigellosis.”



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