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

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

This test detects genetic material from influenza viruses (A or B) in your blood to help diagnose recent infection.

Quick summary

["Quickly checks for flu infection in your bloodstream using a molecular probe method."]

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

Key facts at a glance

LOINC
88187-0
Short code
FLUAV Subtyp Corn/Cnjt NAA+probe
Synonyms
FLUAV Subtyp Corn/Cnjt 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

What This Test Measures

The test identifies the genetic material (RNA) of influenza A or B viruses in your serum or plasma. This is done using a specialized probe that binds to the virus’s genetic sequence, confirming the presence of the virus if detected.

How the Test Works

This is a molecular assay (nucleic acid amplification test) that amplifies and detects viral RNA. It’s highly sensitive and can detect very small amounts of virus, even if symptoms are mild or early.

When You Might Need This Test

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

Limitations and Considerations

This test is designed to detect recent infection and may not show results if you’ve already recovered or if the virus is no longer active in your system. False negatives can occur if the sample is collected too early or if the virus load is very low.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Frequently asked questions

Why is this test important?
This test helps confirm influenza infection quickly, allowing for prompt treatment with antiviral medications if needed. Early treatment can reduce severity and shorten illness duration. It’s also useful for public health monitoring and outbreak management.
How long does it take to get results?
Results are typically available within 24 hours of testing, depending on lab processing times. Your doctor will discuss the results with you during your follow-up visit.
Can this test be done at home?
No, this test requires a blood sample collected by a healthcare professional in a clinical setting. Home testing kits for influenza are different and typically detect antigens rather than genetic material.
  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