<?xml version="1.0"?><ownershipDocument><schemaVersion>X0101</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-05-15</periodOfReport><issuer><issuerCik>0000767673</issuerCik><issuerName>SEROLOGICALS CORP</issuerName>        <issuerTradingSymbol>SERO</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001233512</rptOwnerCik><rptOwnerName>WILCOX M DWAIN</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>  </rptOwnerStreet1><rptOwnerStreet2>  </rptOwnerStreet2><rptOwnerCity>  </rptOwnerCity><rptOwnerState>  </rptOwnerState><rptOwnerZipCode>  </rptOwnerZipCode></reportingOwnerAddress><reportingOwnerRelationship><isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>Vice President</officerTitle><otherText></otherText></reportingOwnerRelationship></reportingOwner><derivativeSecurity><securityTitle><value>Employee Stock Options (Right to Buy)</value></securityTitle><conversionOrExercisePrice><value>11.62</value></conversionOrExercisePrice><transactionDate><value>2003-05-15</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>17500</value></transactionShares><transactionValue><value>0</value></transactionValue><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2004-05-15</value><footnoteId id="F1" /></exerciseDate><expirationDate><value>2009-05-15</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock, $0.01 Par Value</value></underlyingSecurityTitle><underlyingSecurityShares><value>17500</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>100188</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeSecurity><footnotes><footnote id="F1">Options vest at 25% per year after the anniversary date of the effective date.  </footnote></footnotes><ownerSignature><signatureName>/s/ M. Dwain Wilcox</signatureName><signatureDate>2003-05-21</signatureDate></ownerSignature></ownershipDocument>

