NEWS ANNOUNCEMENT FOR IMMEDIATE RELEASE CONTACT: Chris Antonucci at 440-392-7669 STERIS LAUNCHES PROLYSTICA® HP IN RESPONSE TO HEALTHCARE INDUSTRY DEMAND FOR BETTER PERFORMING CLEANING CHEMISTRIES

"Gold standard" premium instrument cleaning chemistry has gotten even better

MENTOR, OHIO - Dec.10, 2013 - STERIS Corporation, with more than 100 years of experience in surgical and infection control environments, has introduced Prolystica® Ultra Concentrate HP Cleaning Chemistries; a new innovation to its premium instrument cleaning chemistries, specifically designed for high-performance in today's challenging healthcare environments.

The latest Prolystica formulations are a 10x concentrate with added de-foaming properties to further reduce the time and effort it takes to rinse surgical tools and equipment. Additionally, the chemistries have proven stronger in removing difficult healthcare soils such as lipids and blood, including those associated with orthopedic surgeries, and cleans devices in less time than previous formulations.
"Sterile processing department managers know, and are confident in our market leading Prolystica brand. By working in tandem with them, we have been able to make the best cleaning chemistries on the market even better," said Mary Beth Nooney, STERIS Product Manager.
The Prolystica Ultra Concentrate HP cleaning chemistries are designed for use in hospital washer/disinfectors. They are formulated for processing surgical instruments and are compatible with an extensive range of substrates, even soft metals.
With Prolystica HP Cleaning Chemistries, performance qualities, that already set the brand apart from competitors, have been enhanced to provide improved levels of productivity and flexibility as well as cost savings. In addition to removing difficult soils, rinsing easily and employing
faster cycle times, they are effective across a broad range of water quality.

STERIS Corporation News Announcement Page 2

Further, Prolystica HP Cleaning Chemistries are designed to protect and maintain the life of the instruments and washers in which they are used; resulting in reductions in inventory and utility consumption.

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 supplies a broad array of equipment, consumable and service solutions that help assure productivity and quality. The Company is listed on the New York Stock Exchange under the symbol STE. For more information, visit www.steris.com. For information
on STERIS healthcare solutions, visit www.steris.com/healthcare/.
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Editor's Note: For additional product information and images, please contact Chris Antonucci:

chris_antonucci@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," "new," "advanced," and "best available," 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, technology advances, and changes in government regulations or the application or interpretation thereof. 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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