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Tips from the Journals of the American Society for Microbiology

Copper Surfaces May Inhibit Influenza A Transmission

Researchers have determined that copper surfaces are significantly better than stainless steel at protecting against influenza A exposure. They report their findings in the April 2007 issue of the journal Applied and Environmental Microbiology.

Influenza A is a viral pathogen responsible for high mortality rates worldwide. The virus is easily transferred and can survive on a range of environmental surfaces. Previous studies have confirmed antimicrobial properties in copper against pathogenic bacteria, but antiviral activity has yet to be tested.

In the study influenza A particles were exposed to copper and stainless steel surfaces and incubated at 71.6 degrees Fahrenheit and 50 to 60% relative humidity. After 6 hours of exposure to copper only 500 virus particles were active, while 500,000 remained viable after 24 hours of incubation on stainless steel.

The current study shows that copper surfaces may contribute to the number of control barriers able to reduce transmission of the virus, particularly in facilities, such as schools and health care units, where viral contamination has the ability to cause serious infection, say the researchers.

(J.O. Noyce, H. Michels, C.W. Keevil. 2007. Inactivation of influenza A virus on copper versus stainless steel surfaces. Applied and Environmental Microbiology, 73. 8: 2748-2750).


Chronic Wasting Disease Transmissible Among Rodents

For the first time, a new study demonstrates that certain rodents can be directly infected with CWD and therefore serve as animal models for further study of the disease. The researchers report their findings in the April 2007 issue of the Journal of Virology.

Chronic wasting disease (CWD), also known as mad cow disease in cattle and Creutzfeldt-Jacob disease in humans, is a transmissible prion disease most commonly found in deer
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Contact: Carrie Patterson
cpatterson@asmusa.org
American Society for Microbiology
26-Apr-2007


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