SARS CoV 2 Nucleocapsid Antibody, IgG

The Abbott Architect SARS-CoV-2 IgG assay, run under an emergency use authorization from the FDA, is a qualitative test designed to detect IgG antibodies to the nucleocapsid protein of SARS-CoV-2 in serum and plasma from patients who are suspected of past coronavirus disease (COVID-19) or in serum and plasma of subjects that may have been infected by SARS-CoV-2.

Reactive (Positive) results may be due to past or present infection with SARS-CoV-2. Results from antibody testing should not be used as the sole basis to diagnose or exclude SARS-CoV-2 infection or to inform infection status.

Nonreactive (Negative) results do not rule out SARS-CoV-2 infection, particularly in those who have been in contact with the virus. Follow-up testing with a molecular diagnostic should be considered to rule out infection in these individuals. Results from antibody testing should not be used as the sole basis to diagnose or exclude SARS-CoV-2 infection or to inform infection status.

For Batteries containing NCVIGG refer to:

SARS-CoV-2 Antibodies (NCVIGG, NCVIGQ)[NCVIGB], The qualitative detection of anti-Nucleocapsid IgG (NCVIGG) and the quantitative detection of anti-Spike IgG (NCVIGQ) antibodies.

For all questions, contact Client Support Services (available 24/7):

Phone: (206) 520-4600 or (800) 713-5198
Fax: (206) 520-4903
Email: commserv@uw.edu

The test order requisition is available online.

UW Medicine Locations

Place order in ORCA, using "COVID-19 Antibody (IgG)".

For UWMC-Northwest ED/inpatients, place a Lab Undefined order in Soarian or PulseCheck for "NCVIGG: COVID-19 IgG."

Other Locations (eg, reference laboratory client)

Send all samples with the requisition available here (form is a fillable pdf - please download and enter information before printing)

• Spin within 24 hours and prior to shipment.
• Sample is stable for 7 days at 2-8°C once separated from a clot or red blood cells, or in a gel separator tube.
• If testing will be delayed more than 7 days store at -20°C or colder.

Send Specimens to:

UW Medicine
Department of Laboratory Medicine
Virology- Central Testing Lab
1602 Raymond Ave SW
Renton, WA 98057-3356
Tel: (206) 658-6656 opt 4

Centrifuge GOLD SST tube and route to Virology Central Lab (Renton).

Centrifuge RED TOP or EDTA tube and aliquot serum/plasma into plastic aliquot tube. Route to Virology Central Lab (Renton).

Stability: Sample stable off the clot, red blood cells, or separator gel for 7 days at 2-8°C. If testing will be delayed more than 7 days store at -20°C or colder.