Influenza Virus Nucleoprotein Antibody, Qualitative Immunoassay (Serum/Plasma)
This test detects antibodies to the nucleoprotein of the influenza virus, helping identify past or current infection.
["Assesses immune response to influenza virus infection, often used for diagnostic confirmation."]
Key facts at a glance
- LOINC
- 108187-6
- Short code
- FLUAV+FLUBV+RSV RNA pnl Spec NAA+probe
- Synonyms
- FLUAV+FLUBV+RSV RNA pnl Spec 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 uses an immunoassay method to detect antibodies specific to the influenza virus’s nucleoprotein. These antibodies develop after exposure to the virus, indicating an immune response. This qualitative test does not measure antibody levels but confirms presence or absence of immunity.
Why It Might Be Ordered
Your healthcare provider may order this test if you have symptoms like fever, cough, or sore throat that could suggest influenza, especially if exposure to the virus is suspected. It can also be used in outbreaks or during flu season to screen for infection.
How the Test Works
A small blood sample is taken and tested for the presence of antibodies against the influenza virus’s nucleoprotein. The immunoassay detects these antibodies by binding to a labeled probe, producing a measurable signal if antibodies are present.
What to Expect Before the Test
No special preparation is needed. You may have a small needle inserted into your arm to draw blood. If you’re pregnant, have a bleeding disorder, or take blood-thinning medications, let your provider know before the test.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance
Short name
Influenza Antibody (Qualitative)
Frequently asked questions
This test helps confirm a diagnosis of influenza infection by showing the body’s immune response. While antibodies indicate past or current infection, they do not distinguish between different influenza virus strains. Results are qualitative, meaning they only say whether antibodies are present or not.
Results are typically available within 24 to 48 hours, depending on lab processing times. Your healthcare provider will discuss the results with you during your follow-up visit.
Yes, this test can be used to screen for influenza infection even if you don’t have symptoms, especially in high-risk groups or during outbreaks. However, it may not detect all types of influenza viruses.
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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