COVID-19 Total Antibodies Serology (Anti-Nucleocapsid)
| Label Mnemonic: | COVIDT |
| Epic code: | LAB9019 |
| Order form: | Laboratory Requisition |
| Supply order: | Supply Order Form |
| Billing: | Billing Policies |
| CPT code: | 86769 |
Specimen(s):
Plasma
Collection Medium:
 |
| Plasma Separator Tube 4.5 mL |
Minimum:
3 mL whole blood from light green top tube or TWO
Microtainer® devices
Testing
Schedule:
24 hrs/day, 7 days a week, including holidays.
Turn Around
Time:
4 hours (upon receipt in laboratory)
Reference Range:
Negative
Interpretive Data:
This Roche assay targets antibodies to the SARS-CoV-2 nucleocapsid (N) protein. Because the SARS-CoV-2 vaccines currently available in the United States market target the spike (S) protein, positive results on the Roche are expected from natural infection but not from vaccination alone. In natural infection, SARS-CoV-2 antibodies are present in a high percentage of patients by 3 weeks after RT-PCR positivity or initial symptoms.
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. A positive result suggests exposure to SARS-CoV-2 but does not necessarily indicate protective immunity. The results of this test should not guide PPE use or adherence to physical distancing practices. False-positive results may occur due to cross-reactivity from pre-existing antibodies (e.g., other coronaviruses) or other causes.
This test has not been cleared or approved by the U.S. Food and Drug Administration (FDA). It has been authorized by the FDA under an Emergency Use Authorization (EUA) for use during the COVID-19 public health emergency by laboratories certified under the Clinical Laboratory Improvement Amendments of 1988 (CLIA) to perform moderate or high complexity testing. This test has been performed according to the manufacturer's instructions under the EUA. This test should not be used for screening of donated blood.
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. A positive result suggests exposure to SARS-CoV-2 but does not necessarily indicate protective immunity. The results of this test should not guide PPE use or adherence to physical distancing practices. False-positive results may occur due to cross-reactivity from pre-existing antibodies (e.g., other coronaviruses) or other causes.
This test has not been cleared or approved by the U.S. Food and Drug Administration (FDA). It has been authorized by the FDA under an Emergency Use Authorization (EUA) for use during the COVID-19 public health emergency by laboratories certified under the Clinical Laboratory Improvement Amendments of 1988 (CLIA) to perform moderate or high complexity testing. This test has been performed according to the manufacturer's instructions under the EUA. This test should not be used for screening of donated blood.
Comments:
Additional information for healthcare providers:
(Roche Diagnostics assay)
Additional information for patients:
(Roche Diagnostics assay)
(Roche Diagnostics assay)
Additional information for patients:
(Roche Diagnostics assay)
Test
Limitations:
Hemolysis: No significant interference up to an H index of 1000 (approximate hemoglobin concentration: 1 g/dL).
Lipemia: No significant interference up to an L index of 2000 (approximate triglycerides concentration: 400 mg/dL). Note there is poor correlation between turbidity and triglyceride concentration.
Icterus: No significant interference up to an I index of 66 (approximate conjugated and unconjugated bilirubin concentration: 66 mg/dL).
Biotin: No significant interference up to 1200 ng/mL biotin.
Lipemia: No significant interference up to an L index of 2000 (approximate triglycerides concentration: 400 mg/dL). Note there is poor correlation between turbidity and triglyceride concentration.
Icterus: No significant interference up to an I index of 66 (approximate conjugated and unconjugated bilirubin concentration: 66 mg/dL).
Biotin: No significant interference up to 1200 ng/mL biotin.
Methodology:
Electrochemiluminescence immunoassay
Sample
Processing:
Centrifuge at a speed and time necessary to get barrier separation of plasma/serum and cells within 1 hour of collection. Send specimen in original tube. Do Not transfer to another tube.
Each sample must be labeled with at least TWO full patient identifiers (First/Last Name & DOB are sufficient for non-UIHC affiliated clients) to avoid sample rejection/delays.
Each sample must be labeled with at least TWO full patient identifiers (First/Last Name & DOB are sufficient for non-UIHC affiliated clients) to avoid sample rejection/delays.
Sample
Storage:
Refrigerate.
All sample storage requirements are intended for delivery to UIHC within 24 hours of collection for testing. If samples won't arrive in this time period, please call the UIHC Core Lab for alternative storage/shipping instructions (319-356-3527).
All sample storage requirements are intended for delivery to UIHC within 24 hours of collection for testing. If samples won't arrive in this time period, please call the UIHC Core Lab for alternative storage/shipping instructions (319-356-3527).
Transport
Instructions:
Place labeled specimen into zip-lock type biohazard bag; seal bag.
Place completed requisition into outside pocket of bag.
Transport in cooler with refrigerated coolant packs.
Place completed requisition into outside pocket of bag.
Transport in cooler with refrigerated coolant packs.
CPT Code:
86769