Exhibit 32

Certification of Chief Executive Officer and Chief Financial Officer

Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the filing with the Securities and Exchange Commission of the Quarterly Report of Meridian Bioscience, Inc. (the “Company”) on Form 10-Q for the period ended March 31, 2005 (the “Report”), the undersigned officers of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of their knowledge:

1.	The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Act of 1934; and
2.	The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ William J. Motto  

William J. Motto 

Chairman of the Board and
Chief Executive Officer 

May 10, 2005

/s/ Melissa Lueke  

Melissa Lueke 

Vice President and
Chief Financial Officer 

May 10, 2005