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Influenza Nucleic Acid Detection by Probe-Based Assay (Serum/Plasma)

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

This test checks for the presence of genetic material from the influenza virus in your blood. It helps determine if you may have an active infection.

Quick summary

["A quick way to detect flu infection in your bloodstream."]

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

Key facts at a glance

LOINC
44265-7
Short code
FLUAV H6 RNA Spec NAA+probe-aCnc
Synonyms
FLUAV H6 RNA 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

What This Test Measures

The test detects genetic material (RNA) from the influenza virus using a specialized probe. This is not a test for antibodies or symptoms but confirms if the virus is actively present in your bloodstream.

How the Test Works

A small blood sample is taken, and the lab uses a molecular method to identify influenza RNA. This method is highly sensitive and can detect even small amounts of the virus.

Why It Might Be Ordered

Your healthcare provider may order this test if you have flu-like symptoms (e.g., fever, cough, body aches) and suspect influenza, especially if you’re at higher risk (e.g., elderly, immunocompromised). It can also be used in outbreak settings or for monitoring.

What to Expect Before the Test

No special preparation is needed. You’ll have a simple blood draw, usually from your arm. The sample is then sent to the lab for analysis.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: This test is critical for diagnosing active influenza infection early, allowing for prompt treatment with antiviral medications if needed. It helps differentiate between viral infections and other causes of similar symptoms, guiding appropriate care.

Short name

Influenza Virus RNA Test

Frequently asked questions

Will this test show if I have had flu before?
No, this test only detects if the influenza virus is currently present in your blood. It does not measure past infections or immunity.
How soon after exposure can I expect results?
Results may take 24 to 48 hours, depending on lab processing times. Your provider will discuss the results with you.
Can I get this test at home?
No, this test requires a lab sample, so it must be performed in a clinical setting, typically at a doctor’s office or hospital.
  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