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Cytomegalovirus (CMV) and Epstein Barr Virus (EBV) PCR

Test code(s) 10600X, 34179X

Question 1. Why did I get a different viral load result in whole blood than in plasma?

These viruses, as well as some others we test for, establish latency within cells found in whole blood. However, these cells are not found in the plasma. PCR can detect latent virus; thus, we can detect latent and active virus (lytic phase) in whole blood but only active virus in plasma.

This FAQ is provided for informational purposes only and is not intended as medical advice. A physician’s test selection and interpretation, diagnosis, and patient management decisions should be based on his/her education, clinical expertise, and assessment of the patient.
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