Quest Diagnostics has released a new semi-quantitative antibody test that detects immunoglobulin G (IgG) antibodies in blood samples. The new SARS-CoV-2 Antibody (IgG), Spike, Semi-Quantitative test (test code 34499) expands beyond the qualitative antibody offering from Quest Diagnostics and provides a numerical result that may be useful in providing evidence of immune response over time (when the same test is used for comparison purposes). This could be especially valuable for individuals enrolled in clinical trials and for vulnerable patient populations.
The new SARS-CoV-2 Antibody (IgG), Spike, Semi-Quantitative test result is reported as positive at an index1,2 of ≥1.00. This positive result indicates that an individual has developed an immune response to a SARS-CoV-2 infection or a SARS-CoV-2 spike vaccine within the limits of the assay.1,2
Conversely, a negative result is reported at an index3,4 of <1.00. A negative semi-quantitative antibody result means that the patient serum specimen had no SARS-CoV-2 spike IgG antibodies or that the relative level of antibodies in the patient specimen was below the index cutoff.1-4
Learn more about SARS-CoV-2 antibody tests from Quest Diagnostics that provide the insights you need to improve patient care and manage the spread of COVID-19.
All SARS-CoV-2 antibody tests must be ordered by a physician, at which time patients may make an appointment at one of Quest’s 2,250 Patient Service Centers.
The FDA requires companies to submit Emergency Use Authorization (EUA) applications for all SARS-CoV-2 antibody tests. The antibody test systems that are used by Quest Diagnostics have been granted EUAs.5 Please note the following:
Learn more about how Quest is delivering the crucial insights you need to make the best decisions for your patients during the COVID-19 pandemic.
Test codes may vary by location. Please contact your local laboratory for more information. Image content features a model and is intended for illustrative purposes only.
The posting of sponsored information and content on this page should not be considered an AAFP endorsement or recommendation of the sponsor's products, services, policies, or procedures. The information and opinions expressed on this page are those of the paid sponsors and do not necessarily reflect the view of the AAFP. The AAFP is not responsible for the content of third-party websites linked from this page; moreover, any links on this page to third-party websites where goods or services are advertised are not endorsements or recommendations by the AAFP of the third-party sites, goods, or services.