Antibody to Flavivirus (e.g., Dengue, Yellow Fever) – Immunoassay
This blood test checks for antibodies that your immune system makes in response to certain viruses, such as dengue or yellow fever. It helps determine if you’ve been exposed to these viruses in the past.
["This test helps diagnose past infection or immunity to flaviviruses."]
Key facts at a glance
- LOINC
- 49525-9
- Short code
- FLUAV H5 Ab Ser Ql
- Synonyms
- FLUAV H5 Ab 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
Why This Test Might Be Ordered
Your healthcare provider may recommend this test if you’ve traveled to areas where flaviviruses are common, have symptoms like fever, headache, or body aches, or if you’ve been exposed to a flavivirus. It can also be used to confirm a diagnosis after a suspected infection or to check for immunity before travel or vaccination.
What to Expect Before the Test
No special preparation is needed. You’ll have a small needle inserted into your arm to draw a blood sample. It usually takes a few minutes, and you may feel a slight pinch. If you’re on blood thinners, let your provider know before the test.
What the Test Results Mean
Positive results indicate the presence of antibodies, suggesting you’ve likely had exposure to a flavivirus in the past. Negative results mean no detectable antibodies, which could mean you’ve never been exposed or the test was taken too early after infection. Results may vary depending on the timing of testing after exposure.
Common Symptoms of Flavivirus Infection
Symptoms of flavivirus infections can include fever, severe headache, joint and muscle pain, fatigue, nausea, vomiting, and sometimes rash. Some people may not have any symptoms at all. If you develop these symptoms after traveling to a high-risk area, see a healthcare provider for evaluation.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
Flavivirus Antibody Test
Frequently asked questions
This test is crucial for diagnosing flavivirus infections, especially in travelers or individuals with a history of exposure. It can also help determine if someone has developed immunity after recovery or vaccination. Early detection is important for managing symptoms and preventing complications.
Results are typically available within 1 to 3 business days, depending on your lab’s processing time. Your healthcare provider will contact you directly with the results.
Yes, this test is generally safe during pregnancy. However, always discuss any medical tests with your healthcare provider, especially if you’re expecting, to ensure it’s appropriate for your situation.
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