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

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

This test checks for the presence of genetic material from the Influenza A virus in your blood. It helps determine if you may have contracted the flu virus.

Quick summary

["A simple blood test to detect flu virus genetic material, supporting diagnosis and monitoring."]

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

Key facts at a glance

LOINC
38271-3
Short code
FLUAV H6 RNA Spec Ql NAA+probe
Synonyms
FLUAV H6 RNA Spec Ql NAA+probe
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

Why This Test Might Be Ordered

Your healthcare provider may order this test if you have symptoms like fever, cough, sore throat, body aches, or fatigue that could be consistent with the flu. It may also be used in outbreaks or during flu season to confirm infection in high-risk individuals or those exposed to the virus.

How the Test Works

The test uses a probe-based method to detect the genetic material (RNA) of Influenza A virus in your blood. This is done through a qualitative assay, meaning it provides a yes/no result rather than a quantitative measurement of virus levels.

Sample Collection and Preparation

A small blood sample is drawn from your arm. The serum or plasma portion of the blood is then analyzed in a laboratory setting using specialized equipment to identify the Influenza A virus RNA.

What to Expect Before the Test

No special preparation is needed for this test. You may eat and drink normally before your blood draw. If you are on blood-thinning medication, inform your healthcare provider beforehand.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Influenza A Virus RNA Test (Serum/Plasma)

Frequently asked questions

How long does it take to get the results of this test?
Results are typically available within 24 to 48 hours, depending on the laboratory’s processing schedule. Your healthcare provider will contact you once the results are ready.
What does a positive result mean?
A positive result indicates the presence of Influenza A virus RNA in your blood, strongly suggesting you have an active infection. This can help guide treatment and isolation measures.
Can I have this test if I am already on antiviral medication?
Yes, you can still have this test even if you are taking antiviral medications. The test is used to confirm infection and guide treatment decisions, regardless of prior or ongoing antiviral use.
  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