Skip to content

Influenza Virus Nucleic Acid Detection by Probe-Based Assay (Respiratory Specimen)

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

This test checks for the genetic material of the influenza virus in your respiratory secretions, helping determine if you have an active infection caused by flu viruses.

Quick summary

["Assists in diagnosing flu infection quickly for appropriate treatment and isolation measures."]

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

Key facts at a glance

LOINC
101983-5
Short code
FLUAV+FLUBV RNA Resp Ql NAA+probe
Synonyms
FLUAV+FLUBV RNA Resp 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

How the Test Works

The test uses a specialized probe to detect the genetic material (nucleic acid) of influenza viruses present in your nasal or throat swab. If the virus is present, the probe binds to its genetic material, triggering a detectable signal that confirms an infection.

What to Expect Before the Test

No special preparation is needed. You’ll provide a sample using a nasal or throat swab during a quick office visit. The sample is then sent to a lab for immediate analysis.

What to Expect After the Test

Results are typically available within hours. If positive, you may need to follow isolation guidelines and seek antiviral treatment if recommended by your healthcare provider.

When This Test Is Needed

Your doctor may order this test if you have symptoms like fever, cough, sore throat, or body aches, especially during flu season, or if you’ve been exposed to someone with flu.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Influenza Virus RNA Test

Frequently asked questions

Why might my doctor recommend this test?
Your doctor may suggest it if you have flu-like symptoms, recent exposure to someone with flu, or if you’re at higher risk for complications from flu (e.g., elderly, pregnant, or immunocompromised individuals).
How accurate is this test?
This test is highly sensitive and specific for detecting influenza viruses in respiratory samples. However, false negatives can occur if the sample is taken too early in the illness or if the virus load is low.
What if my test result is positive?
A positive result means you likely have an active flu infection. Follow your doctor’s advice regarding isolation, antiviral medications (if prescribed), and staying hydrated while you recover.
  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