NEWS ANNOUNCEMENT FOR IMMEDIATE RELEASE CONTACT: Robin Baum at 440-392-7428 STERIS CORPORATION LAUNCHES UNIQUE VAPROQUIP™ DECONTAMINATION ROOM

Modular system turns existing equipment storage room areas into functional, high-turn processing centers

MENTOR, OHIO - May 10, 2013 - Biological contamination can be present almost anywhere in a hospital. Aggressive pathogens on environmental surfaces, such as high-touch, difficult-to- clean surfaces of mobile equipment and furniture, can remain viable for extended periods of
time. Despite the best efforts of the environmental services department, cleaners and chemicals are limited in their effectiveness and difficult to apply to all environmental surfaces. The VaproQuip Decontamination Room (patent pending) is a landmark advance in environmental surface decontamination technology, from a world leader in infection prevention and decontamination.
"STERIS worked extensively with Customers to develop a solution that addresses their key concerns related to cross-contamination on high-touch patient care environmental surfaces," said Ted Mielnik, vice president of global VHP application development. "These include patient and staff safety concerns such as assuring that items are safe to handle once the application is completed, and that using this decontamination process will help to minimize, and sometimes eliminate, the need to manually apply harsh disinfecting chemicals on environmental surfaces. The VaproQuip Room has been engineered to meet these requirements and more, and to provide many practical benefits."
The new VaproQuip Decontamination Room is for noncritical items1 such as equipment, furniture and other environmental surfaces. The room system is designed for the application of Vaprox® Hydrogen Peroxide Sterilant, 2 which can be used as part of a cleaning and decontamination program to destroy pathogens on environmental surfaces. Application of Vaprox sterilant to exposed environmental surfaces achieves sporicidal, bactericidal, fungicidal,

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and virucidal activity. The process leaves no residue and no lingering odor. It has excellent compatibility with a wide variety of materials.
In addition, the VaproQuip Decontamination Room offers a validated decontamination process: its fully automated and monitored process is designed to provide a six-log microbial reduction on environmental surfaces. It is also designed for easy operation. Once the equipment and room are properly installed and qualified, a single button is pushed to initiate the application process.
The VaproQuip Room also offers increased efficiency: washed equipment and furniture surfaces need only be visibly clean and dry before the VHP decontamination process. Once the automated process is initiated, environmental services staff members are free to perform other duties. It also offers numerous safety features; it is completely self-contained and engineered for automated operation away from patient care areas.
In addition, because of the VaproQuip Room's modular panel construction, it can be installed in existing room spaces. It can turn an equipment storage room area, for example, into a functional, high-turn processing center. This allows hospitals to make better use of their existing space.
The new VaproQuip Decontamination Room is a groundbreaking but highly practical leap forward for environmental services and infection control stakeholders. For additional details, please visit www.vaproquip.com.

About STERIS Corporation

STERIS Corporation is a leading provider of infection prevention and surgical products and services, focused primarily on critical healthcare, pharmaceutical and research markets around the world. The Company's approximately 6,000 dedicated employees around the world supply a broad array of equipment, consumable and service solutions that help assure productivity and quality. STERIS is listed on the New York Stock Exchange under the symbol STE. For more information, visit www.steris.com.

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1Noncritical items are defined by the CDC as "those that come in contact with intact skin but not mucous membranes," Guideline for Disinfection and Sterilization in Healthcare Facilities, 2008.

2Vaprox® Hydrogen Peroxide Sterilant; EPA Registration No. 58779-4. Not for use as a terminal sterilant or high-level disinfectant for reprocessing of critical or semi-critical medical devices.

Editor's Note: For high resolution images, please contact me at robin_baum@steris.com.

This news release may contain statements concerning certain expectations, forecasts, estimates, product performance or other forward-looking information affecting or relating to the Company or its products that are intended to qualify for the protections afforded "forward- looking statements" under the Private Securities Litigation Reform Act of 1995 and other laws and regulations. Forward-looking statements speak only as to the date of this report, and may be identified by the use of forward-looking terms such as "may," "will," "expects," "believes," "anticipates," "plans," "safer," "virtually," " typically" and "risk," or the negative of such terms or other

variations on such terms or comparable terminology. Many important factors could cause actual results to differ materially from those in this news release including, without limitation, disruption of production or supplies, changes in product use, pending or future claims or litigation, competitive factors, technology advances, and changes in government regulations or the application or interpretation thereof. Other risk factors are described in the Company's Form 10-K and other securities filings. Many of these important factors are outside STERIS's control. No assurances can be provided as to any product performance or product safety unless all labeling, instructions for use, MSDS and other product literature are strictly followed. Unless legally required, the Company does not undertake to update or revise any forward-looking statements even if events make clear that any projected results, express or implied, will not be realized. Other potential risks and uncertainties that could cause actual results to differ materially from those in this news release include, without limitation, (a) the possibility that market demand will not develop for new technologies, products or application; (b) the possibility that application of or compliance with laws, court rulings, regulations, certifications or other requirements or standards may delay or prevent product introductions, affect the production and marketing of existing products, or otherwise affect product performance; or (c)uses not consistent with product instructions. Product descriptions and performances herein are for illustration only and do not modify labeling, warranties or other technical literature.

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