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Fluorescent Antibody Test for Antibodies to Flavivirus (Serum)

Published: August 9, 2026Updated: August 16, 2026

This test detects antibodies in your blood that may indicate exposure to flaviviruses, such as those causing diseases like dengue, yellow fever, or West Nile virus.

Quick summary

["Helps identify past or potential flavivirus infection by checking for immune response markers."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
47233-2
Short code
FLUAV Ab sp2 Ser Ql
Synonyms
FLUAV Ab sp2 Ser Ql
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 a fluorescent antibody technique to detect specific antibodies in your serum. These antibodies are your body’s immune response to flaviviruses, which are a group of viruses spread by mosquitoes. If antibodies are found, it suggests you may have been exposed to one of these viruses in the past.

Why It’s Done

Your healthcare provider may order this test if you have symptoms like fever, headache, joint or muscle pain, or rash that could be linked to a flavivirus infection. It’s also used in travelers to high-risk areas or after potential exposure.

Sample Collection and Preparation

A blood sample is drawn from a vein, usually in your arm. The blood is processed to separate the serum, which is then tested for antibodies using fluorescent markers. This process helps identify immune activity without relying on viral presence.

What to Expect Before the Test

No special preparation is needed, but inform your provider about any medications, recent illnesses, or travel history that might affect results. Avoid alcohol before the blood draw if possible.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Flavivirus Antibody Screen (Serum)

Frequently asked questions

How long does it take to get results?
Results are typically available within 1–3 business days, depending on lab processing times. Follow-up may be needed if results are inconclusive or if symptoms persist.
Can this test detect all flaviviruses?
This test detects antibodies to flaviviruses broadly but may not distinguish between specific viruses like dengue or yellow fever. Confirmatory testing may be needed for further identification.
What if I have a mild reaction after the blood draw?
Common reactions like bruising or slight pain at the injection site usually resolve within a few hours. Apply ice if needed, and contact your provider if swelling, fever, or excessive discomfort occurs.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

Medical Disclaimer

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