EXHIBIT 99.1


IRIS  ANNOUNCES  APPOINTMENT  OF DONALD C.  MUELLER  AS  CORPORATE  VP AND CHIEF
FINANCIAL OFFICER TO SUCCEED RETIRING MARTIN G. PARAVATO


CHATSWORTH,  Calif.--May 2, 2006--IRIS  International,  Inc.  (NASDAQ:  IRIS), a
manufacturer  and  marketer  of  automated  IVD  urinalysis  systems and medical
devices used in hospitals and clinical reference laboratories  worldwide,  today
announced the  appointment  of Donald C. Mueller as Corporate Vice President and
Chief Financial Officer, replacing Martin G. Paravato, who is taking his planned
retirement.

Mr.  Mueller,  who will assume his new position  May 11, has broad  expertise in
financial and strategic planning, budget development and management,  accounting
and financial  operations,  banking relations and cash management.  Mr. Paravato
will continue in a consulting capacity with the Company.

"Marty Paravato has been an integral part of the new senior management team that
successfully  transitioned  IRIS from a company  mostly  dependent  on a mature,
single legacy product distributed in the U.S. to a major  international  medical
device  company with  multiple  products  and  platforms.  In the process,  IRIS
achieved  record revenues and earnings,  eliminated all debt,  built cash to $19
million at Dec. 31, 2005,  and is confident of  continuing  this trend well into
the future.  We thank Marty for his  contributions  and are pleased that he will
assist us in a smooth  transition,"  said President and Chief Executive  Officer
Cesar Garcia.

"We are  fortunate  that in Don Mueller we have a seasoned  financial  executive
with a brilliant record in corporate financial management,  one who will provide
IRIS ongoing strategic financial guidance and oversight as the Company continues
its rapid growth and  expansion,"  said Mr. Garcia.  "A hallmark of IRIS' longer
range planning has been the continuing  addition in all of our business segments
of  highly  credentialed  executives  with  outstanding  histories  of  business
successes.  Don Mueller  exemplifies  the type of  executive  we require to best
guide and oversee the rapid and orderly growth of our Company."

Mr. Mueller has had more than 20 years of experience in finance and  accounting,
most  recently as Vice  President,  Chief  Financial  Officer and  Treasurer  of
Transportation  Industries,  Inc., a $600 million manufacturer of components for
the  North  American   commercial  vehicles  market,  and  was  instrumental  in
completing the Company's  merger with Accuride  Corporation  (NYSE:ACW).  In his
eight years as a senior  financial  executive at TTI, Mr.  Mueller  arranged and
negotiated  $400 million in financing for a management led buyout of the Company
in 2000, as well as the  refinancing  of $265 million in remaining debt in 2003.
During his tenure,  he also  developed  restructuring  plans and  initiated  the
implementation of Sarbanes-Oxley internal controls.

Mr. Mueller's  previous  corporate  finance  positions were at Fisher Scientific
International,  Inc.  (NYSE:  FSH),  from  1993-1998,  where he served as Acting
Corporate  Controller for the multinational  company with 30 operating units. In
this  position,   he  was   responsible   for  financial   planning,   corporate
consolidation,   Securities  and  Exchange  Commission  reporting  and  internal
controls.  Other  positions  included Vice  President,  Finance-Fisher  Products
Group, with responsibility for financial oversight of 10 manufacturing divisions
with annual sales of $300 million, and Vice President,  Finance, Fisher Hamilton
Inc.

Mr.  Mueller,  42, a Certified  Public  Accountant,  graduated  in 1985 from the
University of San Diego with a Bachelor of Business Administration degree, summa
cum laude,  and began his career as an accountant and audit manager for Deloitte
& Touche.

THE COMPANY

IRIS International,  Inc.  (www.proiris.com) is a leader in automated urinalysis
technology with systems in major medical institutions  throughout the world. The
Company's  newest  generation  iQ(R)200  Automated  Urine  Microscopy  Analyzer,
utilizing image flow cytometry,  patented flow microscope  technology and neural
network-based particle recognition, achieves a significant reduction in the cost
and time-consuming steps involved in manual microscopic analysis.  The Company's
Sample Processing business unit (formerly the StatSpin(R) subsidiary),  based in
Westwood,   Mass.,   manufactures  innovative  centrifuges  and  blood  analysis
products.  Advanced Digital Imaging  Research,  LLC (ADIR),  based near Houston,
Texas, is the Company's imaging research and development subsidiary.





SAFE HARBOR PROVISION

This news release contains forward-looking  statements made in reliance upon the
safe harbor provisions of the Private Securities  Litigation Reform Act of 1995.
Forward-looking  statements include, but are not limited to, the Company's views
on future commercial  revenues,  market growth,  capital  requirements,  and new
product introductions, and are generally identified by phrases such as "thinks,"
"anticipates,"  "believes,"  "estimates,"  "expects,"  "intends,"  "plans,"  and
similar  words.   Forward-looking   statements  are  not  guarantees  of  future
performance and are inherently  subject to uncertainties and other factors which
could  cause  actual  results  to  differ  materially  from the  forward-looking
statement. These statements are based upon, among other things, assumptions made
by, and information currently available to, management,  including  management's
own knowledge and assessment of the Company's industry,  competition and capital
requirements.  Other factors and  uncertainties  that could affect the Company's
forward-looking  statements  include,  among other things,  the  following:  the
acceptance by customers of our new iQ(R)200  product  platform,  our substantial
expansion  of  international  sales  and  our  reliance  on key  suppliers,  the
potential  need  for  changes  in  long-term  strategy  in  response  to  future
developments;  future advances in diagnostic testing methods and procedures,  as
well as potential  changes in government  regulations  and healthcare  policies,
both of which could  adversely  affect the economics of the  diagnostic  testing
procedures  automated by the Company's products;  rapid technological  change in
the microelectronics and software  industries;  and increasing  competition from
imaging and non-imaging based in-vitro diagnostic  products.  The Company refers
interested  persons to its most recent  Annual Report on Form 10-K and its other
SEC filings for a description of additional  uncertainties  and factors that may
affect  forward-looking  statements.  The Company  assumes no duty to update its
forward-looking statements.


CONTACT:
IRIS International, Inc.
Cesar Garcia, 818-709-1244 x123
or
The Wall Street Group, Inc.
Ron Stabiner, 212-888-4848
_______________________________
       Source: IRIS International, Inc.


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