Exhibit 32.2
                    CERTIFICATION PRINCIPAL FINANCIAL OFFICER

              Pursuant to 18 U.S.C.ss. 1350, as adopted pursuant to
                    ss. 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 quarter ending June 30, 2003 (the "Report"), I, Melissa Lueke, Chief
Financial Officer of the Company, certify, pursuant to 18 U.S.C. ss. 1350, as
adopted pursuant to ss. 906 of the Sarbanes-Oxley Act of 2002, that to the best
of my knowledge:

    1)  The Report fully complies with the requirements of section 13(a) or
        15(d) of the Securities Exchange 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/ Melissa Lueke
--------------------------------------
Melissa Lueke, Principal Financial Officer

August 14, 2003
--------------------------------------
Date




A signed original of this statement required by Section 906 has been provided to
Meridian Bioscience, Inc. and will be retained by Meridian Bioscience, Inc. and
furnished to the Securities and Exchange Commission or its staff upon request.





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