Fluorescent Immunoassay for Antibodies to Flavivirus Nucleocapsid Protein (IgG)
This test measures antibodies to the nucleocapsid protein of flaviviruses, including viruses like dengue, Zika, or yellow fever, which may have recently infected you. It helps determine if your immune system has recognized these viruses.
["Assesses past exposure to flaviviruses through antibody detection."]
Key facts at a glance
- LOINC
- 17013-4
- Short code
- FLUAV+FLUBV Ab Ser IF-aCnc
- Synonyms
- FLUAV+FLUBV Ab Ser IF-aCnc
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- if
- 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 recommend this test if you have symptoms like fever, rash, joint pain, or neurological issues that could suggest flavivirus infection. It’s also used in outbreaks or after travel to high-risk areas. This test helps confirm whether your immune response was triggered by a flavivirus rather than another cause.
What to Expect Before the Test
No special preparation is needed. You’ll provide a blood sample, usually drawn from your arm. The test looks for antibodies in your serum or plasma, which your body produces after exposure to flaviviruses.
What the Results Mean
A positive result means your immune system has detected antibodies to the flavivirus nucleocapsid protein, suggesting past exposure. A negative result indicates no detectable antibodies at this time. Results may take several days to return and should be interpreted by your healthcare provider.
Common Reasons for Testing
This test is often used in outbreaks, travel-related exposures, or when other tests (like dengue serology) are inconclusive. It helps differentiate between flaviviruses or rule out other infections causing similar symptoms.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
While this test confirms past exposure, it does not indicate active infection. If you’re experiencing symptoms, your doctor may order additional tests (like PCR or other serology) to determine if you’re currently ill. Antibody levels can change over time, so results may not be reliable if tested too soon or too late after exposure.
Short name
Flavivirus IgG Antibody (Nucleocapsid)
Frequently asked questions
Will this test show if I have an active infection right now?
Can I get this test if I’ve never been tested before for flaviviruses?
How long does it take to get results from this test?
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