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  <xs:element id="ste_BusinessAcquisitionsandDivestituresAbstract" abstract="true" name="BusinessAcquisitionsandDivestituresAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ste_TermLoanLongTermPortion" abstract="false" name="TermLoanLongTermPortion" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ste_BusinessCombinationConvertibleDebtParValueAssumed" abstract="false" name="BusinessCombinationConvertibleDebtParValueAssumed" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ste_COVID19PandemicTextBlock" abstract="false" name="COVID19PandemicTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="ste_Fairvalueofoutstandingstockappreciationrights" abstract="false" name="Fairvalueofoutstandingstockappreciationrights" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ste_CapitalequipmentrevenuesMember" abstract="true" name="CapitalequipmentrevenuesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ste_DentalMember" abstract="true" name="DentalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ste_DebtInstrumentConvertibleParentShares" abstract="false" name="DebtInstrumentConvertibleParentShares" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ste_UncertainTaxLiabilityResultingFromIRSNotice" abstract="false" name="UncertainTaxLiabilityResultingFromIRSNotice" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ste_HealthcareMemberMember" abstract="true" name="HealthcareMemberMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ste_ParValueEurosofDeferredOrdinaryShares" abstract="false" name="ParValueEurosofDeferredOrdinaryShares" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ste_CapitalizedComputerHardwareSoftwareGross" abstract="false" name="CapitalizedComputerHardwareSoftwareGross" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ste_OperatingAndFinanceLeaseObligationNoncurrent" abstract="false" name="OperatingAndFinanceLeaseObligationNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ste_LongTermDebtExcludingDeferredFinancingFees" abstract="false" name="LongTermDebtExcludingDeferredFinancingFees" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ste_RSUsCantelMember" abstract="true" name="RSUsCantelMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ste_ExpectedrecognitionbeyondthenextyearMemberMember" abstract="true" name="ExpectedrecognitionbeyondthenextyearMemberMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ste_PaymentsForAcquisitionOfSubsidiaryInterestsInNoncontrollingInterest" abstract="false" name="PaymentsForAcquisitionOfSubsidiaryInterestsInNoncontrollingInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ste_BusinessCombinationLongTermObligationsAssumed" abstract="false" name="BusinessCombinationLongTermObligationsAssumed" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ste_OperatingLossIncomeAttributableToCantel" abstract="false" name="OperatingLossIncomeAttributableToCantel" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ste_HealthcareSpecialtyServicesMember" abstract="true" name="HealthcareSpecialtyServicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ste_SubsequentEventUnsecuredTermLoanCreditFacility" abstract="false" name="SubsequentEventUnsecuredTermLoanCreditFacility" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ste_Two700SeniorNotesDue2051MemberMember" abstract="true" name="Two700SeniorNotesDue2051MemberMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ste_PaymentForAcquisitionOfSubsidiarysInterestsInNoncontrollingInterest" abstract="false" name="PaymentForAcquisitionOfSubsidiarysInterestsInNoncontrollingInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ste_ReclassificationToCantelConvertibleDebtPremiumLiability" abstract="false" name="ReclassificationToCantelConvertibleDebtPremiumLiability" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ste_Longtermliabilitiesother" abstract="false" name="Longtermliabilitiesother" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ste_EntityAbstract" abstract="true" name="EntityAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ste_COVID19incrementalcosts" abstract="false" name="COVID19incrementalcosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ste_Amortizationofinventoryandpropertystepuptofairvalue" abstract="false" name="Amortizationofinventoryandpropertystepuptofairvalue" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ste_AmortizationOfInventoryFairValueAdjustments" abstract="false" name="AmortizationOfInventoryFairValueAdjustments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ste_DeferredCostofRevenuesAmountrecognizedinperiodfromcertaincapitalcontracts" abstract="false" name="DeferredCostofRevenuesAmountrecognizedinperiodfromcertaincapitalcontracts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ste_SubsequentEventPurchasePriceOfEntityNetOfTaxBenefits" abstract="false" name="SubsequentEventPurchasePriceOfEntityNetOfTaxBenefits" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ste_ConsiderationRelatedToEquityComponentOfConvertibleDebt" abstract="false" name="ConsiderationRelatedToEquityComponentOfConvertibleDebt" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ste_HealthcareLifeSciencesMember" abstract="true" name="HealthcareLifeSciencesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ste_HealthcareandLifeSciencesMember" abstract="true" name="HealthcareandLifeSciencesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ste_AdditionsMember" abstract="true" name="AdditionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ste_ValueEUROSOrdinarySharesDeferred" abstract="false" name="ValueEUROSOrdinarySharesDeferred" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ste_ShareBasedCompensationArrangementByShareBasedPaymentAwardConversionRatio" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardConversionRatio" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:decimalItemType"/>
  <xs:element id="ste_OtherInvestmentsLevel3table" abstract="false" name="OtherInvestmentsLevel3table" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
