Human T-lymphotropic virus type I/II antibody screening by serology (qualitative)
This test detects antibodies to the Human T-lymphotropic virus (HTLV), a virus that can cause serious health conditions like adult T-cell leukemia/lymphoma or tropical spastic paraparesis.
["This screening helps identify if you’ve been exposed to HTLV, which may require further evaluation by your healthcare provider."]
Key facts at a glance
- LOINC
- 39589-7
- Short code
- HTLV I p19 Ab Ser-aCnc
- Synonyms
- HTLV I p19 Ab Ser-aCnc
- 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 Is Done
Your doctor may order this test if you have symptoms like persistent fatigue, unexplained weight loss, or skin changes, or if you live in an area with higher HTLV prevalence. It’s also sometimes recommended for blood donors or those with certain immune-related conditions.
What to Expect During the Test
A blood sample is taken from a vein in your arm. You may feel a small pinch, but it usually doesn’t cause discomfort. The test itself is quick and doesn’t require special preparation.
What the Results Mean
A positive result means your blood contains antibodies to HTLV, indicating past or possible current infection. A negative result means no detectable antibodies were found in this test. Follow-up testing may be needed to confirm or investigate further.
Next Steps and Follow-Up
If your test is positive, your doctor will likely recommend additional tests to confirm the diagnosis and assess your health. They may also discuss treatment options or monitoring plans.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
HTLV infection can lie dormant for years but may lead to serious diseases if untreated. Early detection is important, as treatment options and management strategies can vary based on symptoms and health status. Your doctor will guide you on next steps based on your specific results and medical history.
Short name
HTLV-I/II Antibody Screen
Frequently asked questions
What does a positive result mean for my health?
Will I need to take any special steps if my test is positive?
Can I still donate blood if my HTLV test is positive?
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