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New Disinfection System for Health Care Spaces and Surfaces Print E-mail
SciMed - Healthcare
TS-Si News Service   
Monday, 12 December 2011 04:00
Hospital Gurney.Kingston, Ontario, Canada. An infectious disease expert has collaborated in the development of a disinfection system that may change the way hospital rooms all over the world are cleaned as well as stop bed bug outbreaks in hotels and apartments.

The disinfection technology has also been used to kill bed bugs. A major U.S. hotel chain has expressed interest because of its potential to save the company millions of dollars in lost revenue and infected furniture.


"This is the future, because many hospital deaths are preventable with better cleaning methods," says Dick Zoutman of Queen's University, who is also Quinte Health Care's new Chief of Staff. "It has been reported that more than 100,000 people in North America die every year due to hospital acquired infections at a cost of $30 billion. That's 100,000 people every year who are dying from largely preventable infections." The findings appear in the American Journal of Infection Control (AJIC).

Dick E Zoutman, M.D., FRCPC.

Dick E Zoutman, M.D., FRCPC, is an Associate Professor of Pathology, and of Community Health and Epidemiology, at Queen's University.
The new technology involves pumping a Medizone-specific ozone and hydrogen peroxide vapour gas mixture into a room to completely sterilize everything – including floors, walls, drapes, mattresses, chairs and other surfaces. It is far more effective in killing bacteria than wiping down a room.

Dr. Zoutman says the technique is similar to what we now know Mother Nature uses to kill bacteria in humans. When an antibody attacks a germ, it generates ozone and a minute amount of hydrogen peroxide producing a new highly reactive compound that is profoundly lethal against bacteria, viruses and mold.

"It works well for Mother Nature and is working very well for us," says Dr. Zoutman

There are other disinfecting technologies that involve pumping gas into a room, but Medizone's method is the only one that sterilizes as well as surgical instrument cleaning. It also leaves a pleasant smell and doesn't affect any medical equipment in the room. The entire disinfection process is also faster than other methods – it takes less than one hour.

Dr. Zoutman says the technology could also be used in food preparation areas and processing plants after outbreaks such as listeria and to disinfect cruise ships after an infection outbreak.

Zoutman worked in collaboration with Dr. Michael Shannon of Medizone International, Inc., at laboratories located in Innovation Park, Queen's University. Medizone is commercializing the technology and the first deliveries are scheduled for the first quarter of 2012.

CitationEffectiveness of a novel ozone-based system for the rapid high-level disinfection of health care spaces and surfaces. Dick Zoutman, Michael Shannon, Arkady Mandel. American Journal of Infection Control 2011; 39(10): 873-879. doi:10.1016/j.ajic.2011.01.012

Abstract

Background. Vapor-based fumigant systems for disinfection of health care surfaces and spaces is an evolving technology. A new system (AsepticSure) uses an ozone-based process to create a highly reactive oxidative vapor with broad and high-level antimicrobial properties.

Methods. Ozone gas at 50-500 ppm was combined with 3% hydrogen peroxide vapor in a test chamber and upscaled in rooms measuring 82 m3 and 90 m3 in area. Test organisms included methicillin-resistant Staphylococcus aureus, vancomycin-resistant enterococcus, Escherichia coli, Pseudomonas aeruginosa, Clostridium difficile, and Bacillus subtilis spores dried onto steel discs or cotton gauze pads.

Results. The combination of 80-ppm ozone with 1% hydrogen peroxide vapor achieved a very high level of disinfection, with a =6 log10 reduction in the bacteria and spores tested on steel discs and MRSA tested on cotton gauze during a 30- to 90-minute exposure. The entire system was scalable such that it achieved the same high level of disinfection in both the 81-m3 and 90-m3 rooms in 60-90 minutes.

Conclusion. The ozone hydrogen peroxide vapor system provides a very high level of disinfection of steel and gauze surfaces against health care-associated bacterial pathogens. The system is an advanced oxidative process providing a rapid and effective means of disinfecting health care surfaces and spaces.

Keywords: ozonation, hydrogen peroxide, fumigation.

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Last Updated on Sunday, 11 December 2011 19:54