IRIS International (IRIS)

Consent of Independent Registered Public Accounting Firm

To the Board of Directors and Shareholders

of Iris International, Inc.

Chatsworth, California

We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (File No’s. 333-27189, 333-37946, 333-86617, 333-48097, 333-110826, 333-115393, 333-118577, 333-135442 and 333-147618) and Form S-8 (File Nos. 33-10631, 33-56772, 33-82560, 333-19265, 333-31391, 333-45348, 333-31393, 333-63304, 333-65547, 333-103462, 333-122501, 333-127952, 333-137738 and 333-145635) of IRIS International, Inc. of our reports dated March 5, 2009, relating to the consolidated financial statements, and the effectiveness of Iris International, Inc’s internal control over financial reporting, which appears in this Form 10-K.

/s/ BDO Seidman, LLP

BDO Seidman, LLP

Los Angeles, California

March 5, 2009

Consent of Independent Registered Public Accounting Firm

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Shareholders

of IRIS International, Inc.

Chatsworth, California

We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (File No’s. 333-27189, 333-37946, 333-86617, 333-48097, 333-110826, 333-115393, 333-118577, 333-135442 and 333-147618) and Form S-8 (File Nos. 33-10631, 33-56772, 33-82560, 333-19265, 333-31391, 333-45348, 333-31393, 333-63304, 333-65547, 333-103462, 333-122501, 333-127952 333-137738 and 333-145635) of IRIS International, Inc. of our reports dated March 14, 2008, relating to the consolidated financial statements and the effectiveness of IRIS International, Inc.’s internal control over financial reporting, which appear in this Form 10-K.

BDO SEIDMAN, LLP

/s/ BDO Seidman, LLP

Los Angeles, California

March 14, 2008

Consent of Independent Registered Public Accounting Firm

To the Board of Directors and Shareholders

of IRIS International, Inc.

Chatsworth, California

We hereby consent to the incorporation by reference in the Registration Statements on Forms S-8 (File Nos. 33-10631, 33-56772, 33-82560, 333-19265, 333-31391, 333-45348, 333-31393, 333-63304, 333-65547, 333-103462, 333-122501,333-127952 and 333-137738) and Forms S-3 (File No’s. 333-27189, 333-37946, 333-86617, 333-48097, 333-110826, 333-115393, 333-118577 and 333-135442) of our reports dated March 22, 2007 relating to the consolidated financial statements and the effectiveness of IRIS International, Inc.’s internal control over financial reporting , which appear in this Annual Report on Form 10-K.

Consent of Independent Registered Public Accounting Firm

To the Board of Directors and Shareholders

of IRIS International, Inc.

Chatsworth, California

We hereby consent to the incorporation by reference in the Registration Statements on Forms S-8 (File Nos. 33-10631, 33-56772, 33-82560, 333-19265, 333-31391, 333-45348, 333-31393, 333-63304, 333-65547, 333-103462, 333-122501 and 333-127952) and Forms S-3 (File No’s. 333-27189, 333-37946, 333-86617, 333-48097, 333-110826, 333-115393 and 333-118577) of our reports dated March 3, 2006, relating to the consolidated financial statements and the effectiveness of IRIS International, Inc.’s internal control over financial reporting , which appear in this Annual Report on Form 10-K.

/s/ BDO Seidman, LLP

Los Angeles, California

March 14, 2006

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Shareholders

of IRIS International, Inc.

Chatsworth, California

We consent to the incorporation by reference in the Registration Statements on Form S-8 (File Nos. 33-10631, 33-56772, 33-82560, 333-19265, 333-31391, 333-45348, 333-31393, 333-63304, 333-65547, 333-103462, and 333-122501) and Form S-3 (File No’s. 333-27189, 333-37946, 333-86617, 333-48097, 333-110826, 333-115393 and 333-118577) of IRIS International, Inc., of our Report dated July 29, 2005, relating to the financial statements of the Urinalysis Business of Quidel Corporation, a business unit of Quidel Corporation, as of and for the year ended December 31, included in this Current Report on Form 8-K.

/s/ Ernst & Young LLP

San Diego, California

August 12, 2005

Consent of Independent Registered Public Accounting Firm

To the Board of Directors and Shareholders

of IRIS International, Inc.

Chatsworth, California

We hereby consent to the incorporation by reference in the Registration Statements on Forms S-8 (File Nos. 33-10631, 33-56772, 33-82560, 333-19265, 333-31391, 333-45348, 333-31393, 333-63304, 333-65547, 333-103462, and 333-122501) and Forms S-3 (File No’s. 333-27189, 333-37946, 333-86617, 333-48097, 333-110826, 333-115393 and 333-118577) of IRIS International, Inc. of our reports dated February 25, 2005, relating to the consolidated financial statements and the effectiveness of IRIS International, Inc.’s internal control over financial reporting, which appear in this Annual Report on Form 10-K.