Human Herpesvirus 6 (HHV-6) DNA in Whole Blood by Nucleic Acid Amplification Probe

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms like fever, rash, or fatigue that could be linked to HHV-6 infection. It may also be used before or after treatments that weaken your immune system, such as chemotherapy, stem cell transplants, or solid organ transplants. Rarely, it could be part of monitoring for conditions like graft-versus-host disease or certain autoimmune disorders.

What to Expect Before the Test

No special preparation is needed for this test. You may have a small needle inserted into your arm or hand to draw a sample of whole blood. This is usually done in a doctor’s office or lab. If you’re undergoing treatments that affect your immune system, your provider may discuss precautions to minimize infection risk.

What the Test Results Mean

If the test finds HHV-6 DNA in your blood, it means the virus is present. This doesn’t always mean you’re sick, but it can indicate an active infection or reactivation. If results are negative, the virus isn’t detected in this sample. Follow-up testing or additional questions may be needed based on your symptoms and medical history.

Common Reasons for Monitoring

Healthcare providers may monitor HHV-6 DNA levels in people with weakened immune systems to track virus activity. This can help guide treatment decisions, such as adjusting medications to prevent flare-ups or infections. It’s also used in research or clinical trials for certain diseases.