Antibody to Flavivirus Nucleocapsid Protein (IgG)
This test measures the presence of antibodies against the nucleocapsid protein of flaviviruses, which includes viruses like dengue, Zika, and West Nile. It helps determine if your immune system has been exposed to these viruses.
["This test helps diagnose past infection with flaviviruses, which can cause fever, rash, and neurological symptoms."]
Key facts at a glance
- LOINC
- 50708-7
- Short code
- FLUAV PB2 RNA Islt Ql Seq
- Synonyms
- FLUAV PB2 RNA Islt Ql Seq
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- sequencing
- 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 Does This Test Measure?
The test detects IgG antibodies specific to the nucleocapsid protein of flaviviruses. These antibodies develop in your blood after your immune system has encountered the virus. The presence of these antibodies suggests a previous infection, though they may persist long after symptoms have resolved.
Why Might I Need This Test?
Your healthcare provider may order this test if you have symptoms of a flavivirus infection (such as fever, headache, or rash) and suspect exposure to dengue, Zika, or West Nile virus. It can also be used in research or epidemiological studies to track virus spread.
Sample Collection and Preparation
A blood sample is typically drawn from a vein in your arm. The blood is processed to separate serum (liquid part of blood without clots), which is then tested for the antibodies.
What to Expect Before the Test
No special preparation is needed for this test. You may have some mild discomfort or bruising at the injection site, but this usually goes away quickly.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
This test is primarily used to confirm past infection with flaviviruses, which can help diagnose conditions like dengue fever, Zika virus disease, or West Nile virus infection. It can also be useful in identifying exposure in travelers, research participants, or individuals with unexplained symptoms. However, it cannot distinguish between different flaviviruses or confirm active infection.
Short name
IgG Antibody to Flavivirus Nucleocapsid
Frequently asked questions
How long does it take to get results from this test?
Can this test detect active infection with flaviviruses?
What are the possible reasons for a positive result?
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