<?xml version="1.0"?><ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-08-19</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0000767673</issuerCik><issuerName>SEROLOGICALS CORP</issuerName>        <issuerTradingSymbol>SERO</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001193613</rptOwnerCik><rptOwnerName>KRAMER JAMES J</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>5655 SPALDING DRIVE</rptOwnerStreet1><rptOwnerStreet2></rptOwnerStreet2><rptOwnerCity>NORCROSS</rptOwnerCity><rptOwnerState>GA</rptOwnerState><rptOwnerZipCode>30092</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>Vice President</officerTitle></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common Stock, $0.01 Par Value</value></securityTitle><transactionDate><value>2003-08-19</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>P</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>250</value></transactionShares><transactionPricePerShare><value>13.3</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>1402</value><footnoteId id="F1" /></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><footnotes><footnote id="F1">Includes 652 Deferred Stock Units received as a result of deferring a portion of his annual bonus.  The shares are issuable upon the grantees last day of employment with the Company.</footnote></footnotes><remarks></remarks><ownerSignature><signatureName>/s/ Craig Brown, Attorney in Fact for James J. Kramer</signatureName><signatureDate>2003-08-21</signatureDate></ownerSignature></ownershipDocument>

