Skip to content

Human T-lymphotropic virus type I antibody screening by immunoassay (serum/plasma)

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

This test detects antibodies to the Human T-lymphotropic virus type 1 (HTLV-1), a virus that can cause serious health conditions like adult T-cell leukemia/lymphoma or HTLV-1-associated myelopathy (HAM/TSP).

Quick summary

["This screening helps identify if your body has been exposed to HTLV-1, which may require further evaluation."]

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

Key facts at a glance

LOINC
14216-6
Short code
HTLV1 gp46 Ab Ser Ql
Synonyms
HTLV1 gp46 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 Is Done

Your healthcare provider may recommend this test if you have symptoms like persistent fatigue, unexplained weight loss, fever, or swollen lymph nodes. It’s also used in high-risk groups, such as those from regions where HTLV-1 is more common, or if you have family members with HTLV-1-related illnesses.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, usually drawn from your arm. The test is quick and typically done in a lab setting.

What the Test Results Mean

A positive result means your body has detected antibodies to HTLV-1, suggesting past exposure. A negative result means no detectable antibodies were found in this sample. Follow-up testing may be needed to confirm or investigate further.

Next Steps After Testing

If positive, your doctor may order additional tests, like a confirmatory assay, to determine if you have active infection. They may also recommend monitoring for complications over time.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

HTLV-1 Antibody Screen

Frequently asked questions

What does a positive result mean?
A positive result indicates your body has antibodies to HTLV-1, meaning you may have been exposed. This does not confirm active infection, and further testing is needed to assess risk and next steps.
Can I get HTLV-1 from sharing needles or blood transfusions?
Yes, HTLV-1 can be transmitted through blood transfusions (rarely) or sharing needles, but it is not spread through casual contact like hugs, coughs, or sharing food.
How often should I get this test if I’m at risk?
If you’re in a high-risk group (e.g., living in regions with HTLV-1 prevalence, having children with HTLV-1, or engaging in behaviors that increase exposure), your doctor may recommend periodic testing. Follow their guidance based on your specific situation.
  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