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GTR Home > > Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) IgG, Blood Spot

Overview

Test order codeHelp: CORBS

Test name

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Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) IgG, Blood Spot (SARS-CoV-2 IgG, Bld Spot)

Purpose of the test

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This is a clinical microbial test intended for Help: Screening

Condition

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How to order

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CPT Code 86769. Contact Customer Service (https://www.mayocliniclabs.com/customer-service/contacts.html)
Order URL Help: https://www.mayocliniclabs.com/order-tests/account-setup.html

Specimen source

Peripheral (whole) blood

Sample requirements

For details on sample collection, see https://www.mayocliniclabs.com/test-catalog/Specimen/609799

Turnaround time

48 hours

Methodology

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Serology
OAntibody assay
Microsphere Multiplex Flow Immunoassay (MFI)
  • xMAP SARS-CoV-2 Multi-Antigen IgG Assay (Luminex Corporation)

Summary of what is tested

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Clinical utility

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Not provided

Clinical validity

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Not provided

Comments about the test interpretation (e.g. clinical implication of test results)

Negative: No IgG antibodies to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) detected. Negative results may occur if the test is done too soon following infection, in patients who are immunosuppressed, or in patients with very mild or asymptomatic infection. This test does not rule out active or recent coronavirus disease 2019 (COVID-19) and will not detect SARS-CoV-2 vaccine-induced antibodies. Positive: Results suggest infection with SARS-CoV-2 at some time in the past. A positive result does not indicate protection against reinfection with SARS-CoV-2. False-positive results may occur. Confirmatory testing using a venipuncture blood draw may be considered in low-risk individuals or those residing in low-prevalence regions. Inconclusive: Presence or absence of antibodies to SARS-CoV-2 could not be determined. Repeat testing on a new dried blood spot specimen or a venipuncture blood draw may be considered.

Clinical resources

Practice guidelines

  • NICE, 2024
    UK NICE Guideline NG191, COVID-19 rapid guideline: managing COVID-19, 2024

Consumer resources

IMPORTANT NOTE: NIH does not independently verify information submitted to the GTR; it relies on submitters to provide information that is accurate and not misleading. NIH makes no endorsements of tests or laboratories listed in the GTR. GTR is not a substitute for medical advice. Patients and consumers with specific questions about a genetic test should contact a health care provider or a genetics professional.