Antibody to Flavivirus Nucleocapsid Protein (IgG)
This test measures your immune system’s response to flaviviruses, including potential exposure to viruses like dengue, Zika, or West Nile. It detects antibodies produced after infection or vaccination.
["Helps determine past exposure to flaviviruses and supports diagnosis or monitoring of infection."]
Key facts at a glance
- LOINC
- 82166-0
- Short code
- FLUAV RNA Nph Ql NAA+n-prb
- Synonyms
- FLUAV RNA Nph Ql NAA+n-prb
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- non-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 looks for IgG antibodies against the nucleocapsid protein of flaviviruses. These antibodies are produced by your immune system in response to infection or vaccination. The presence of these antibodies suggests you may have been exposed to flaviviruses in the past, but they do not indicate an active infection at the time of testing.
Why It’s Done
Doctors may order this test to investigate suspected flavivirus exposure, especially in travelers or individuals with symptoms like fever, rash, or joint pain. It can also help confirm a diagnosis in cases where other tests are inconclusive or to monitor immune response post-vaccination.
Sample Collection and Preparation
A blood sample is taken from a vein in your arm. The blood is processed to separate serum or plasma, which is then tested for flavivirus-specific antibodies using a sensitive immunoassay method.
What to Expect Before the Test
No special preparation is needed. You may eat and drink normally before the test, but inform your healthcare provider if you are on blood-thinning medications or have a history of bleeding disorders.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
IgG Antibody to Flavivirus Nucleocapsid
Frequently asked questions
How long does it take to get results?
Can I have this test if I’m pregnant?
A positive result suggests you may have been exposed to flaviviruses in the past, but it does not confirm an active infection. It may indicate prior infection, vaccination, or both. Further testing may be needed to determine current health status.
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