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<!-- DFIN ActiveDisclosure(SM) XBRL Schema Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date      : 2021-03-07T06:35:57.9145642+00:00 -->
<!-- Version            : 5.0.1.571 -->
<!-- Package ID         : a5563cab6dae402b8f9b59b44a4e3ead -->
<!-- Copyright (c) 2021 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
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  <xsd:element id="flgt_AvailableForSaleSecuritiesDebtEquitySecuritiesAndTradingSecurities" name="AvailableForSaleSecuritiesDebtEquitySecuritiesAndTradingSecurities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="flgt_IncomeBeforeEquityNetIncomeLossInInvesteeAndImpairmentLoss" name="IncomeBeforeEquityNetIncomeLossInInvesteeAndImpairmentLoss" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="flgt_InvestmentMarginLiabilitiesCurrent" name="InvestmentMarginLiabilitiesCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="flgt_TwoThousandNineteenEquityDistributionAgreementMember" name="TwoThousandNineteenEquityDistributionAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_TwoThousandTwentyEquityDistributionAgreementMember" name="TwoThousandTwentyEquityDistributionAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_SeptemberTwoThousandTwentyEquityDistributionAgreementMember" name="SeptemberTwoThousandTwentyEquityDistributionAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_NovemberTwoThousandTwentyEquityDistributionAgreementMember" name="NovemberTwoThousandTwentyEquityDistributionAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_NoncashLeaseExpense" name="NoncashLeaseExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="flgt_UnrecognizedTaxBenefitsOperatingActivities" name="UnrecognizedTaxBenefitsOperatingActivities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="flgt_HoldingIncomeLossOnEquitySecurities" name="HoldingIncomeLossOnEquitySecurities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="flgt_ImpairmentIncomeLossInEquityMethodInvestment" name="ImpairmentIncomeLossInEquityMethodInvestment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="flgt_IncreaseDecreaseInOperatingLeaseLiabilities" name="IncreaseDecreaseInOperatingLeaseLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="flgt_PaymentsForPurchaseOfEquipmentContributedToEquityMethodInvestee" name="PaymentsForPurchaseOfEquipmentContributedToEquityMethodInvestee" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="flgt_ProceedsFromSaleOfMarketableSecurities" name="ProceedsFromSaleOfMarketableSecurities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="flgt_NoncashOrPartNoncashOperatingLeaseLiabilitiesRemovedDueToPurchasingOfUnderlyingAssets" name="NoncashOrPartNoncashOperatingLeaseLiabilitiesRemovedDueToPurchasingOfUnderlyingAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="flgt_NoncashOrPartNoncashPublicOfferingProceedsInOtherReceivableIncludedInOtherCurrentAssets" name="NoncashOrPartNoncashPublicOfferingProceedsInOtherReceivableIncludedInOtherCurrentAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="flgt_NoncashOrPartNoncashPublicOfferingCostsIncludedInAccountsPayable" name="NoncashOrPartNoncashPublicOfferingCostsIncludedInAccountsPayable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="flgt_DebtCommitmentsAndContingenciesDisclosureTextBlock" name="DebtCommitmentsAndContingenciesDisclosureTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_DebtCommitmentsAndContingenciesDisclosureAbstract" name="DebtCommitmentsAndContingenciesDisclosureAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_LessorAndLesseeOperatingLeasesTextBlock" name="LessorAndLesseeOperatingLeasesTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_EquityDistributionAgreementsDisclosureTextBlock" name="EquityDistributionAgreementsDisclosureTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_UnderwritingAgreementTextBlock" name="UnderwritingAgreementTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_UnderwritingAgreementAbstract" name="UnderwritingAgreementAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_ContractLiabilitiesPolicyTextBlock" name="ContractLiabilitiesPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_OverheadExpensesPolicyTextBlock" name="OverheadExpensesPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_CostOfRevenuePolicyTextBlock" name="CostOfRevenuePolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_SellingAndMarketingExpensesPolicyTextBlock" name="SellingAndMarketingExpensesPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_EmergingGrowthCompanyPolicyTextBlock" name="EmergingGrowthCompanyPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_ScheduleOfAllowanceForDoubtfulAccountsOnAccountsReceivableTableTextBlock" name="ScheduleOfAllowanceForDoubtfulAccountsOnAccountsReceivableTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_ScheduleOfSupplementalCashFlowInformationRelatedToLeasesTableTextBlock" name="ScheduleOfSupplementalCashFlowInformationRelatedToLeasesTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_ScheduleOfSupplementalInformationRelatedToLeasesTableTextBlock" name="ScheduleOfSupplementalInformationRelatedToLeasesTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_BadDebtExpense" name="BadDebtExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="flgt_SecuritiesMaturityPeriod" name="SecuritiesMaturityPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_SummaryOfSignificantAccountingPoliciesLineItems" name="SummaryOfSignificantAccountingPoliciesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_SummaryOfSignificantAccountingPoliciesTable" name="SummaryOfSignificantAccountingPoliciesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_CustomerOneMember" name="CustomerOneMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_CustomerTwoMember" name="CustomerTwoMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_NumberOfCustomers" name="NumberOfCustomers" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_NumberOfCustomerTypes" name="NumberOfCustomerTypes" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_TaxEffectsRelatedToUnrealizedHoldingGainsOnMarketableDebtSecurities" name="TaxEffectsRelatedToUnrealizedHoldingGainsOnMarketableDebtSecurities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="flgt_ClinicalInsuranceContractsMember" name="ClinicalInsuranceContractsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_ClinicalInstitutionalContractsMember" name="ClinicalInstitutionalContractsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_ClinicalPatientContractsMember" name="ClinicalPatientContractsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_AvailableForSaleSecuritiesAndTradingSecuritiesCost" name="AvailableForSaleSecuritiesAndTradingSecuritiesCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="flgt_AvailableForSaleSecuritiesDebtEquitySecuritiesAndTradingSecuritiesAmortizedCostBasis" name="AvailableForSaleSecuritiesDebtEquitySecuritiesAndTradingSecuritiesAmortizedCostBasis" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="flgt_EquitySecuritiesFvNiAccumulatedGrossUnrealizedGainBeforeTax" name="EquitySecuritiesFvNiAccumulatedGrossUnrealizedGainBeforeTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="flgt_EquitySecuritiesFvNiAccumulatedGrossUnrealizedLossBeforeTax" name="EquitySecuritiesFvNiAccumulatedGrossUnrealizedLossBeforeTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="flgt_ShortTermMarketableSecuritesMember" name="ShortTermMarketableSecuritesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_LongTermMarketableSecuritiesMember" name="LongTermMarketableSecuritiesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_YankeeDebtSecuritiesMember" name="YankeeDebtSecuritiesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_ScheduleOfAvailableForSaleAndTradingSecuritiesLineItems" name="ScheduleOfAvailableForSaleAndTradingSecuritiesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_ScheduleOfAvailableForSaleAndTradingSecuritiesTable" name="ScheduleOfAvailableForSaleAndTradingSecuritiesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_MarginAccountBorrowingMember" name="MarginAccountBorrowingMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_ProceedsFromSaleOfMarketableEquitySecurities" name="ProceedsFromSaleOfMarketableEquitySecurities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="flgt_FairValueAssetsTransfersBetweenLevelsAmount" name="FairValueAssetsTransfersBetweenLevelsAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="flgt_MarketableSecuritiesMember" name="MarketableSecuritiesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_MedicalLabEquipmentMember" name="MedicalLabEquipmentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_AircraftMember" name="AircraftMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_AutomobileMember" name="AutomobileMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_GeneralEquipmentMember" name="GeneralEquipmentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_AssetsNotYetPlacedInServiceMember" name="AssetsNotYetPlacedInServiceMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_ReagentsAndSuppliesCurrent" name="ReagentsAndSuppliesCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="flgt_MarketableSecuritiesInterestReceivableCurrent" name="MarketableSecuritiesInterestReceivableCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="flgt_OtherCountriesMember" name="OtherCountriesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_PaymentsForRemainingDepositAmountOwed" name="PaymentsForRemainingDepositAmountOwed" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="flgt_PaymentsForClosingOfEscrowFinancedUnderMarginLoan" name="PaymentsForClosingOfEscrowFinancedUnderMarginLoan" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="flgt_DebtInstrumentInterestRateAtBeginningOfPeriod" name="DebtInstrumentInterestRateAtBeginningOfPeriod" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_RefundableDeposits" name="RefundableDeposits" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="flgt_DebtInstrumentInterestRateAtEndOfPeriod" name="DebtInstrumentInterestRateAtEndOfPeriod" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_DebtCommitmentsAndContingenciesLineItems" name="DebtCommitmentsAndContingenciesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_DebtCommitmentsAndContingenciesTable" name="DebtCommitmentsAndContingenciesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_ReagentAndOtherSuppliesMember" name="ReagentAndOtherSuppliesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_OperatingLeasesTermOfExpiration" name="OperatingLeasesTermOfExpiration" type="xbrli:gYearMonthItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_OfficeSpaceLeaseMember" name="OfficeSpaceLeaseMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_CopierMember" name="CopierMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_InterestAndOtherIncomeNetMember" name="InterestAndOtherIncomeNetMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_NumberOfOperatingLeasesEntered" name="NumberOfOperatingLeasesEntered" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_NumberOfShortTermLeasesEntered" name="NumberOfShortTermLeasesEntered" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilities" name="CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="flgt_LessorOperatingLeaseRemainingTermOfContractIncludingRenewalOptions" name="LessorOperatingLeaseRemainingTermOfContractIncludingRenewalOptions" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_ShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems" name="ShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_ShareBasedCompensationAllocationOfRecognizedPeriodCostsTable" name="ShareBasedCompensationAllocationOfRecognizedPeriodCostsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageGrantDateFairValue" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageGrantDateFairValue" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsCanceledInPeriodWeightedAverageGrantDateFairValue" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsCanceledInPeriodWeightedAverageGrantDateFairValue" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_TwoThousandSixteenOmnibusIncentivePlanMember" name="TwoThousandSixteenOmnibusIncentivePlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_EmployeeServiceShareBasedCompensationNonvestedAwardsCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptionsOnGrantDate" name="EmployeeServiceShareBasedCompensationNonvestedAwardsCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptionsOnGrantDate" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="flgt_DeferredIncomeTaxExpenseBenefitIncludingOfChangeInValuationAllowance" name="DeferredIncomeTaxExpenseBenefitIncludingOfChangeInValuationAllowance" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="flgt_EffectiveIncomeTaxRateReconciliationReturnToProvision" name="EffectiveIncomeTaxRateReconciliationReturnToProvision" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_EffectiveIncomeTaxRateReconciliationOtherPermanentDifferences" name="EffectiveIncomeTaxRateReconciliationOtherPermanentDifferences" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_DeferredTaxAssetsForeignTaxes" name="DeferredTaxAssetsForeignTaxes" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="flgt_DeferredTaxAssetsLeaseLiability" name="DeferredTaxAssetsLeaseLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="flgt_DeferredTaxLiabilitiesDepreciation" name="DeferredTaxLiabilitiesDepreciation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="flgt_DeferredTaxLiabilitiesRightOfUseAsset" name="DeferredTaxLiabilitiesRightOfUseAsset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="flgt_NetOperatingLossCarryforwardsExpirationBeginningYear" name="NetOperatingLossCarryforwardsExpirationBeginningYear" type="xbrli:gYearItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_NetOperatingLossCarryforwardsExpirationEndingYear" name="NetOperatingLossCarryforwardsExpirationEndingYear" type="xbrli:gYearItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_IncomeTaxesLineItems" name="IncomeTaxesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_IncomeTaxesTable" name="IncomeTaxesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_ResearchAndDevelopmentCreditsAndDepreciationAdjustmentsMember" name="ResearchAndDevelopmentCreditsAndDepreciationAdjustmentsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_AHMCHealthcareIncMember" name="AHMCHealthcareIncMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_GeneticSequencingServiceMember" name="GeneticSequencingServiceMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_JEMEnterpriseMember" name="JEMEnterpriseMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_OfficeFurnitureAndSuppliesMember" name="OfficeFurnitureAndSuppliesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_PTJAssociatesIncMember" name="PTJAssociatesIncMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_ChiefScientificExecutiveOfficerMember" name="ChiefScientificExecutiveOfficerMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_XilongScientificMember" name="XilongScientificMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_XiLongUSAMember" name="XiLongUSAMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_FFGeneBiotechMember" name="FFGeneBiotechMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_FuzhouJinqiangInvestmentPartnershipLPMember" name="FuzhouJinqiangInvestmentPartnershipLPMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_FulgentPharmaLimitedLiabilityCompanyMember" name="FulgentPharmaLimitedLiabilityCompanyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_ResearchDevelopmentServiceMember" name="ResearchDevelopmentServiceMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_ContributionsToBeMadeInJointVenture" name="ContributionsToBeMadeInJointVenture" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="flgt_ContributionPeriodInJointVenture" name="ContributionPeriodInJointVenture" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_ContributionsRemainForJointVenture" name="ContributionsRemainForJointVenture" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="flgt_ContributionsMadeToJointVenture" name="ContributionsMadeToJointVenture" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="flgt_PreviousContributionPeriodInJointVenture" name="PreviousContributionPeriodInJointVenture" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_BostonMoleculesIncMember" name="BostonMoleculesIncMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_EquityMethodInvestmentPercentageOfConsolidatedAssetsEquityAndIncomeFromContinuingOperations" name="EquityMethodInvestmentPercentageOfConsolidatedAssetsEquityAndIncomeFromContinuingOperations" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xsd:element id="flgt_InvestmentAndDirectCosts" name="InvestmentAndDirectCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="flgt_SaleOfStockWeightedAverageNetSellingPricePerShare" name="SaleOfStockWeightedAverageNetSellingPricePerShare" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_EquityDistributionAgreementsLineItems" name="EquityDistributionAgreementsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_EquityDistributionAgreementsTable" name="EquityDistributionAgreementsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_EquityOfferingPrice" name="EquityOfferingPrice" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="flgt_PercentageOfCommissionToBePaidFromGrossProceeds" name="PercentageOfCommissionToBePaidFromGrossProceeds" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="flgt_UnderwritingAgreementLineItems" name="UnderwritingAgreementLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_ScheduleOfUnderwritingAgreementTable" name="ScheduleOfUnderwritingAgreementTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_PurchaseAgreementMember" name="PurchaseAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="flgt_SaleOfStockWeightedAverageSellingPricePerShare" name="SaleOfStockWeightedAverageSellingPricePerShare" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
</xsd:schema>
