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UW Health SMPH
American Family Children's Hospital

UW Hospital and Clinics Lab Test Directory

Test Name: EBV Quantitative by PCR

Test Code(s): EBVPCR / HCEBVPCR

CPT Code(s): 87799

Methodology: Real-Time PCR

Clinical Significance: Detect and quantitate Epstein-Barr Virus (EBV) in blood.

Days Performed: Mon-Fri.

Turnaround Time: Stat: Not available stat.
Routine: 2 - 3 days.


Specimen Requirements

Specimen: Blood

Collection Container: Preferred: Lavender top
Also Acceptable: Yellow top(with ACD-A/B anticoagulant)

Collection Volume: Preferred: 6 mL
Pediatrics: 2 mL

Sample Analyzed: Whole Blood

Volume Required: Preferred: 3 mL
Pediatrics: 1.2 mL

Specimen Processing: Do not spin whole blood.

Specimen Transport: Transport specimen to UWHC Core Laboratory (B4/220) immediately.

Outreach Specimen Transport: Transport whole blood at room temperature to UWHC Core Laboratory (B4/220) using priority overnight delivery only.

Unacceptable Criteria: LIMIT: One specimen every 48 hours.

Stability: Ambient: 4 days
Refrigerated: 7 days
Frozen: Unacceptable


Interpretation

Expected Results:

Not detected or low levels

 

The reported concentration of Epstein-Barr virus particles in blood or body fluids may indicate viremia levels and treatment efficacy.

 

Detection of low levels of EBV in specimens containing leukocytes is not unexpected, due to the ubiquitous nature of EBV infection in the population.

 

While detection of EBV in blood is considered more sensitive, clinical studies suggest that cell-free plasma PCR is most specific in the diagnosis of EBV-related disease, including post-transplant lymphoproliferative disorder (PTLD). [Wagner HJ et al., Transplantation, Sept. 27, 2001; vol 72, 1012-1019.]

Test Limitations:

Analytical measurement range for this test is 2,000-1,000,000 copies/mL (3.30-6.00 log10 copies/mL) of specimen.

 

Inadequate specimen collection, processing and storage may invalidate test results. This test should not be used as the only criterion to form a clinical conclusion; instead, results should be correlated with other test results, patient symptoms and clinical presentation.

 

DNA sequence polymorphisms in EBV strains may result in underestimation of viral levels. The presence of variations in EBV DNA sequences are monitored in the real-time PCR assay. This assay does not genotype the virus and consequently does not provide any information regarding EBV drug resistance.

Additional Information:

For specimens in which EBV DNA is detected and between the analytical measurement range (AMR), a quantitative value (copies/mL) will be reported. If EBV DNA is detected, but below 2,000 copies/mL, a result of "Detected, below AMR" will be reported. A result of >1,000,000 copies/mL will be reported as "Detected, above AMR." If EBV DNA is not detected, a result of "Not detected" will be reported.

 

The performance characteristics of this test were validated by UWHC Clinical Laboratories. The U.S. Food and Drug Administration (FDA) has not approved or cleared this test; however, FDA approval or clearance is currently not required for clinical use of this test. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions. The UWHC Clinical Laboratories is authorized under Clinical Laboratory Improvement Amendments (CLIA) to perform high-complexity testing.

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