-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 mjwjff8ZTL/0bynKjpGmAQ==

<SEC-DOCUMENT>0001127602-10-006259.txt : 20100225
<SEC-HEADER>0001127602-10-006259.hdr.sgml : 20100225
<ACCEPTANCE-DATETIME>20100225133710
ACCESSION NUMBER:		0001127602-10-006259
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20100224
FILED AS OF DATE:		20100225
DATE AS OF CHANGE:		20100225

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			KRAEUTLER JOHN A
		CENTRAL INDEX KEY:			0001224662

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-14902
		FILM NUMBER:		10632761

	MAIL ADDRESS:	
		STREET 1:		3471 RIVER HILLS DRIVE
		CITY:			CINCINNATI
		STATE:			OH
		ZIP:			45244

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MERIDIAN BIOSCIENCE INC
		CENTRAL INDEX KEY:			0000794172
		STANDARD INDUSTRIAL CLASSIFICATION:	IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES [2835]
		IRS NUMBER:				310888197
		STATE OF INCORPORATION:			OH
		FISCAL YEAR END:			0930

	BUSINESS ADDRESS:	
		STREET 1:		3471 RIVER HILLS DR
		CITY:			CINCINNATI
		STATE:			OH
		ZIP:			45244
		BUSINESS PHONE:		5132713700

	MAIL ADDRESS:	
		STREET 1:		3471 RIVER HILLS DRIVE
		CITY:			CINCINNATI
		STATE:			OH
		ZIP:			45244

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MERIDIAN DIAGNOSTICS INC
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>form4.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-02-24</periodOfReport>

    <issuer>
        <issuerCik>0000794172</issuerCik>
        <issuerName>MERIDIAN BIOSCIENCE INC</issuerName>
        <issuerTradingSymbol>VIVO</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001224662</rptOwnerCik>
            <rptOwnerName>KRAEUTLER JOHN A</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3471 RIVER HILLS DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CINCINNATI</rptOwnerCity>
            <rptOwnerState>OH</rptOwnerState>
            <rptOwnerZipCode>45244</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <officerTitle>Chief Executive Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
                <footnoteId id="F1"/>
                <footnoteId id="F2"/>
            </securityTitle>
            <transactionDate>
                <value>2010-02-24</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F4"/>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>25600</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>22.00</value>
                    <footnoteId id="F3"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>225260</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">As a result of technological limitations of the EDGAR system, this Form 4 is being filed in two parts: this current report
and another Form 4 of the reporting party filed on the same date. To minimize confusion, only the current report includes
the information in Table II. As such, both this Form and the other Form 4 of the reporting party filed on the same date
should be read in tandem.</footnote>
        <footnote id="F2">As a result of technological limitations of the EDGAR system, this Form 4 is being filed in two parts: this current report
and another Form 4 of the reporting party filed on the same date. To minimize confusion, only the other report of the
reporting party filed on the same date includes the information in Table II. As such, both this Form and the other Form 4 of
the reporting party filed on the same date should be read in tandem.</footnote>
        <footnote id="F3">Prices ranged from $22.00 to $22.03 per share. The reporting person undertakes to provide full pricing information if requested by the Securities and Exchange Commission, the issuer or a securityholder of the issuer.</footnote>
        <footnote id="F4">Sales made pursuant to a Rule 10b5-1 trading plan.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Bryan T. Baldasare as Attorney-in-fact for John A. Kraeutler</signatureName>
        <signatureDate>2010-02-25</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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