Human T-lymphotropic virus type I/II antibody screening by immunoassay (serum/plasma)
This test detects antibodies to the Human T-lymphotropic virus (HTLV), which can indicate past or current infection. HTLV is a rare virus that primarily affects the immune system.
["This screening helps identify if you may have been exposed to HTLV, though it does not confirm active infection alone."]
Key facts at a glance
- LOINC
- 14219-0
- Short code
- HTLV I p26 Ab Ser Ql
- Synonyms
- HTLV I p26 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 have risk factors for HTLV infection, such as living in or traveling to regions with higher prevalence (e.g., certain parts of the Caribbean, Southeast Asia, or parts of Africa and the Americas). It may also be suggested if you have symptoms like fatigue, rash, or nerve problems that could be linked to HTLV-related conditions.
What to Expect Before the Test
No special preparation is needed. You’ll provide a blood sample, usually drawn from your arm. If you’re nervous, let your provider know—they can help ensure it’s comfortable for you.
What the Test Results Mean
A positive result means your blood contains antibodies to HTLV-I or HTLV-II, suggesting past exposure. A negative result means no detectable antibodies were found in this sample, but it doesn’t guarantee you’re not infected. Follow-up testing (like confirmation) may be needed if results are positive.
Common Symptoms Linked to HTLV Infection
HTLV can cause long-term health issues, including rare cancers (like adult T-cell leukemia/lymphoma) or nerve disorders (like tropical spastic paraparesis). Symptoms may take years to develop and can include fatigue, muscle weakness, or unexplained weight loss.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
HTLV screening is critical for early detection in high-risk populations. Positive results prompt further evaluation, including confirmation tests and medical monitoring. Even if you’re asymptomatic, ongoing follow-up may be recommended to prevent complications.
Short name
HTLV-I/II Antibody Screen
Frequently asked questions
What does a positive result mean?
Can I get HTLV if I’ve had unprotected sex or shared needles?
Do I need to repeat this test if I get a negative 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