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Viral Nucleic Acid Detection in Nasopharyngeal Specimen (Qualitative)

Published: August 9, 2026Updated: August 16, 2026

This test checks for the presence of genetic material from certain viruses in your nasal or throat swab. It helps diagnose infections like colds, flu, or respiratory illnesses.

Quick summary

["This test helps identify viral infections quickly, guiding treatment and isolation decisions."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
108217-1
Short code
EBV DNA Spec NAA+probe-aCnc
Synonyms
EBV DNA Spec NAA+probe-aCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe-amp-tar
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

How the Test Works

A swab is taken from your nose or throat to collect a sample. The test detects viral genetic material using a specialized probe that binds to specific viral sequences. If the virus is present, the probe will bind, triggering a detectable signal.

What to Expect Before the Test

No special preparation is needed. You may have a slight sore throat or nasal discomfort after the swab, but this is normal. Avoid rinsing your mouth or nose with liquids before the test.

What to Expect After the Test

Results are typically available within 24 hours. You may receive a call or email with the results. If the test is positive, follow your healthcare provider’s advice for next steps.

Common Uses of This Test

This test is commonly used to diagnose respiratory viral infections, such as COVID-19, influenza, or other viruses causing cold-like symptoms. It can also be used in outbreaks or for monitoring high-risk individuals.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Frequently asked questions

Why might my doctor order this test?
Your doctor may order this test if you have symptoms of a viral infection, such as fever, cough, or sore throat, or if you are in a setting where viral infections are common, like a hospital or school. It helps determine if you need treatment, isolation, or further testing.
What does a positive result mean?
A positive result means that viral genetic material was detected in your sample. This suggests you are likely infected with the virus at the time of testing. Your doctor will discuss next steps, which may include treatment, monitoring, or additional testing.
What does a negative result mean?
A negative result means no viral genetic material was detected in your sample. This does not always mean you are not infected. You may still be contagious, or the infection may have already cleared. Follow your doctor’s advice for further care or monitoring.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy