Antibody to Flavivirus Nucleoprotein (IgG) - Serum
This test measures the presence of antibodies against the nucleoprotein of flaviviruses, which include viruses like dengue, yellow fever, and Zika. It helps determine if your immune system has been exposed to these viruses.
["Checks for past exposure to flaviviruses through antibody detection."]
Key facts at a glance
- LOINC
- 107365-9
- Short code
- FLUAV RNA Spt Ql NAA+n-prb
- Synonyms
- FLUAV RNA Spt Ql NAA+n-prb
- Category
- chemistry
- Sample
- sputum
- Container
- Sterile sputum container
- Units
- N/A
- Ref low
- 0.8
- Ref high
- 1.2
- Critical range
- — – 5 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- non-probe-amp-tar
- CPT
- 85610
- SNOMED
- 396252006
- Specimen volume
- 3-5 mL
- Stability
- Room temperature: 2h, Refrigerated: 24h
- TAT
- 4–24 hours
- Order
- routine
What This Test Measures
The test detects IgG antibodies specific to the nucleoprotein of flaviviruses. These antibodies develop after your body has encountered the virus, typically several weeks to months after infection. This test is often used in research or specialized diagnostic settings rather than routine clinical practice.
Why It Might Be Ordered
Your healthcare provider may order this test if you have symptoms suggestive of flavivirus infection (e.g., fever, rash, joint pain) and live in or traveled to an area where these viruses are common. It can also be used in research studies or for specific diagnostic purposes in certain clinical scenarios.
How the Test Works
A blood sample is taken from you and sent to a laboratory. The serum is analyzed to detect IgG antibodies against flavivirus nucleoproteins using an immunoassay method. This method identifies the presence of these antibodies by detecting their interaction with a labeled probe.
Sample Collection and Preparation
A small amount of blood is drawn from a vein in your arm. The blood is then processed to separate the serum, which is the liquid part containing the antibodies. This serum is sent to the lab for testing.
Reference range
INR: 0.8-1.2 (warfarin: 2.0-3.0)N/A
Inform your healthcare provider if you are taking blood thinners. No special preparation required.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Positive results indicate past exposure to flaviviruses, suggesting your immune system has encountered these viruses. This can be useful in epidemiological studies, research, or for confirming exposure in specific clinical contexts. However, it does not indicate whether you currently have an active infection. Always consult your healthcare provider for interpretation of results in the context of your symptoms and medical history.
Short name
IgG Antibody to Flavivirus Nucleoprotein
Frequently asked questions
What does a positive result mean?
What does a negative result mean?
How soon after exposure can I expect results?
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