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HelpTest Code EBVQN Epstein-Barr Virus DNA Detection and Quantification, Plasma
Shipping Instructions
1. Ship specimen frozen on dry ice only.
2. If shipment will be delayed for more than 24 hours, freeze plasma at -20 to -80° C (up to 84 days) until shipment on dry ice.
Specimen Required
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Collection Container/Tube: Lavender top (EDTA)
Submission Container/Tube: Plastic vial
Specimen Volume: 1.5 mL
Collection Instructions:
1. Centrifuge blood collection tube per manufacturer's instructions (eg, centrifuge within 2 hours of collection for BD Vacutainer tubes).
2. Aliquot plasma into plastic vial.
Useful For
Diagnosis of Epstein-Barr virus (EBV)-associated infectious mononucleosis in individuals with equivocal or discordant EBV serologic marker test results
Diagnosis of post-transplant lymphoproliferative disorders (PTLD), especially in EBV-seronegative organ transplant recipients receiving antilymphocyte globulin for induction immunosuppression and OKT-3 treatment for early organ rejection
Monitoring progression of EBV-associated PTLD in organ transplant recipients
This test should not be used to screen asymptomatic patients.
Method Name
Real-Time Polymerase Chain Reaction (RT-PCR)
Reporting Name
EBV DNA Detect/Quant, PSpecimen Type
Plasma EDTASpecimen Minimum Volume
0.5 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Plasma EDTA | Frozen (preferred) | 84 days | |
| Refrigerated | 6 days |
Reject Due To
| Gross hemolysis | OK |
| Gross lipemia | OK |
| Gross icterus | OK |
Clinical Information
Primary infection with Epstein-Barr virus (EBV), a DNA virus in the Herpesviridae family, may cause infectious mononucleosis resulting in a benign lymphoproliferative condition characterized by fever, fatigue, sore throat, and lymphadenopathy. Infection occurs early in life, and by 10 years of age, 70% to 90% of children have been infected with this virus. Usually, infection in children is asymptomatic or mild and may be associated with minor illnesses, such as upper respiratory tract infection, pharyngitis, tonsillitis, bronchitis, and otitis media.
The target cell for EBV infection is the B lymphocyte. Immunocompromised individuals lacking antibody to EBV are at risk for acute EBV infection that may cause lymphoproliferative disorders in organ transplant recipients (post-transplant lymphoproliferative disorders: PTLD) and AIDS-related lymphoma. The incidence of PTLD ranges from 1% for kidney transplant recipients to as high as 9% for heart/lung transplants and 12% for pancreas transplant patients.
EBV DNA can be detected in the blood of patients with this viral infection. Increasing serial levels of EBV DNA in plasma have been shown to correlate highly with subsequent (in 3-4 months) development of PTLD in susceptible patients. Organ transplant recipients (at risk for primary EBV infection) who are seronegative for EBV (most often children) and receive antilymphocyte globulin for induction immunosuppression and OKT-3 treatment for early organ rejection are at the highest risk for developing PTLD when compared to immunologically normal individuals with prior EBV infection.
Reference Values
Undetected
Interpretation
The quantification range of this assay is 35 to 100,000,000 IU/mL (1.54 log to 8.00 log IU/mL), with a limit of detection (95% detection rate) at 19 IU/mL.
Increasing levels of Epstein-Barr virus (EBV) DNA in serial plasma specimens of a given organ transplant recipient may indicate possible development of post-transplant lymphoproliferative disorder (PTLD).
An "Undetected" result indicates that EBV DNA is not detected in the plasma specimen (see Cautions). If clinically indicated, repeat testing in 1 to 2 months is recommended.
A result of "<35 IU/mL" indicates that the EBV DNA level present in the plasma specimen is below 35 IU/mL (1.54 log IU/mL), and the assay cannot accurately quantify the EBV DNA present below this level.
A quantitative value (reported in IU/mL and log IU/mL) indicates the EBV DNA level (ie, viral load) present in the plasma specimen.
A result of ">100,000,000 IU/mL" indicates that the EBV DNA level present in the plasma specimen is above 100,000,000 IU/mL (8.00 log IU/mL), and this assay cannot accurately quantify the EBV DNA present above this level.
An "Inconclusive" result indicates that the presence or absence of EBV DNA in the plasma specimen could not be determined with certainty after repeat testing in the laboratory, possibly due to polymerase chain reaction inhibition or presence of interfering substance. Submission of a new specimen for testing is recommended if clinically indicated.
Cautions
Serial determination of plasma specimens from organ transplant recipients may be necessary to monitor increasing (risk of development of post-transplant lymphoproliferative disorders) or decreasing (treatment efficacy) levels of Epstein-Barr virus (EBV) DNA.
Nonsymptomatic EBV viremia or viral shedding may occasionally occur in healthy individuals. Therefore, this test should be used only for patients with a clinical history and symptoms consistent with EBV infection. Test results must be interpreted in the context of patient's clinical history, signs, and symptoms.
Due to potential differences in assay performance, serial monitoring of a patient's EBV viral load should be performed using the same exact assay. On average, this assay quantifies EBV DNA in plasma 3-fold (about 0.48 log IU/mL) higher than the laboratory-developed quantitative EBV DNA assay previously performed at Mayo Clinic Laboratories due to differences in the specimen extraction method and design in the amplification primers and probes for the viral target sequences.
Method Description
The cobas Epstein-Barr virus (EBV) assay is a US Food and Drug Administration-approved, in vitro nucleic acid amplification test for the quantification of EBV DNA in human EDTA-plasma using the cobas 6800 or 8800 system for fully automated viral nucleic acid extraction (generic silica-based capture technique) and automated amplification and detection of the viral RNA. This dual-target polymerase chain reaction (PCR) assay amplifies 2 highly-conserved target regions within the EBV genome (EBNA-1 and BMRF gene regions) for real-time detection and quantification by 2 target-specific TaqMan probes. A non-EBV armored DNA quantitation standard (DNA-QS) is introduced into each specimen during sample preparation to serve as internal control for nucleic acid extraction and PCR amplification and detection processes. Fluorescent reporter dye-labeled TaqMan probes hybridized to the complementary EBV target sequences and DNA-QS sequence undergo hydrolysis during PCR amplification step to generate fluorescent signal detected in 3 different dye channels. Concentration of the EBV DNA in a patient's plasma sample is determined by a ratio of the intensity of the fluorescent dye from the cleaved EBV target sequence probes to that of the DNA-QS target probe detected throughout the PCR process.(Package insert: cobas EBV-Quantitative nucleic acid test for use on the cobas 6800/8800 Systems. Roche Molecular Systems, Inc; Rev 1.0, 08/2020)
Day(s) Performed
Monday through Saturday
Report Available
1 to 3 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Test Classification
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.CPT Code Information
87799
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| EBVQN | EBV DNA Detect/Quant, P | 43730-1 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 615297 | EBV DNA Detect/Quant, P | 43730-1 |