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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 HmEgRdbgjQSEc15MY75ADyTsBUX5VtbaA7BkYSzBt+KXf+WpCW+SsRiLdZQSKm4v
 gBki+qRqNnZh6MW+tFt7mA==

<SEC-DOCUMENT>0001144204-07-058375.txt : 20071106
<SEC-HEADER>0001144204-07-058375.hdr.sgml : 20071106
<ACCEPTANCE-DATETIME>20071106110007
ACCESSION NUMBER:		0001144204-07-058375
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20071029
FILED AS OF DATE:		20071106
DATE AS OF CHANGE:		20071106

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MISONIX INC
		CENTRAL INDEX KEY:			0000880432
		STANDARD INDUSTRIAL CLASSIFICATION:	LABORATORY APPARATUS & FURNITURE [3821]
		IRS NUMBER:				112148932
		STATE OF INCORPORATION:			NY
		FISCAL YEAR END:			0630

	BUSINESS ADDRESS:	
		STREET 1:		1938 NEW HIGHWAY
		CITY:			FARMINGDALE
		STATE:			NY
		ZIP:			11747
		BUSINESS PHONE:		5166949555

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MEDSONIC INC
		DATE OF NAME CHANGE:	19930328

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Ryan Michael C
		CENTRAL INDEX KEY:			0001417061

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-10986
		FILM NUMBER:		071216446

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		631-694-9555

	MAIL ADDRESS:	
		STREET 1:		1014 SOPHIA LANE
		CITY:			MARS
		STATE:			PA
		ZIP:			16046
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>v092248_ex.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2007-10-29</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000880432</issuerCik>
        <issuerName>MISONIX INC</issuerName>
        <issuerTradingSymbol>MSON</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001417061</rptOwnerCik>
            <rptOwnerName>Ryan Michael C</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1014 SOPHIA LANE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>MARS</rptOwnerCity>
            <rptOwnerState>PA</rptOwnerState>
            <rptOwnerZipCode>16046</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>SVP, Medical Division</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <remarks>No securities are beneficially owned.</remarks>

    <ownerSignature>
        <signatureName>/s/ Michael C. Ryan</signatureName>
        <signatureDate>2007-11-02</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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