Securities and Exchange Commission
Washington, D.C. 20549
RE: STERIS Corporation
Commission File No. 0-20165
1933 Act and 1934 Act Filings

Authorized Representatives

Gentlemen:

     The above Company is the issuer of securities registered under Section 12 of the
Securities Exchange Act of 1934. The person signing below confirms, as of the date
appearing opposite his signature, that each of the "Authorized Representatives" named
below is authorized on his behalf to sign such statements (on Form 3, Form 4, Form 5,
Form 144, Schedule 13G, or otherwise) with respect to securities of the Company (the
"Securities"), and to submit to the Securities and Exchange Commission such filings
(including reports, notices, and other statements) with respect to the Securities, as are
required by the Securities Act of 1933 or the Securities Exchange Act of 1934
(collectively, the "Acts"). The person so signing also confirms the authority of each of
the Authorized Representatives to do and perform, on his behalf, any and all acts and
things with respect to the Securities requisite or necessary to assure compliance by the
signing person with the filing requirements of the Acts. The authority confirmed herein
shall remain in effect as to the person signing below until such time as the Commission
shall receive from that person a written communication terminating or modifying the
authority.

Authorized Representatives

Mark D. McGinley
Michael J.Tokich
Ronald E. Snyder
Dennis P Patton
J. Adam Zangerle

Dated:  January 14, 2008			                   By:  /s/ Michael Tokich