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Surface Disinfectants Not Potent Enough to Destroy Viruses That Cause Gastroenteritis

by Savitha C Muppala on March 19, 2010 at 10:38 PM
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 Surface Disinfectants Not Potent Enough to Destroy Viruses That Cause Gastroenteritis

Nearly 40% of available disinfectants that are commonly employed to clean surfaces are incapable of destroying noroviruses, which are behind the onslaught of food borne gastroenteritis.

According to a recent study published by Université Laval researchers in the Journal of Food Protection, only bleach-based disinfectants drastically reduce the concentration of these viruses.

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Noroviruses spread directly via contact with infected persons or indirectly through contaminated objects, foods, or surfaces. The effectiveness of disinfectants used to clean surfaces at home or at businesses in the food sector is therefore crucial for limiting the spread of these viruses, which affect over 21 million people every year in the United States alone.

The team of researchers led by Julie Jean, professor at the Faculty of Agriculture and Food Sciences, tested the efficacy of three major categories of household disinfectants in eliminating noroviruses: bleach-based products, alcohol-based products, and quaternary ammonium-based products.
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Lab tests showed that five minutes of contact with a bleach-based disinfectant reduced the concentration of noroviruses on a stainless steel surface by a factor of 1,000. Alcohol- and quaternary ammonium-based products proved 100 times less effective.

"Our results are of particular concern considering that some 40% of the commercial surface disinfectants on the market are alcohol or ammonium based," stressed Professor Jean, who is also a researcher at the Institute of Nutraceuticals and Functional Foods (INAF).

Julie Jean's team also discovered that it takes only ten minutes for human noroviruses to firmly latch on to a stainless steel surface. "Once attached, these viruses can survive for weeks and potentially contaminate anyone who touches them. And it's highly probable that our findings on stainless steel surfaces also apply to other materials," concluded Professor Jean.



Source: Eurekalert
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