HTLV-I Infection Blood Test

What is Human T-Cell Lymphotropic Virus type I infection?

Human T-Cell Lymphotropic Virus Type I (HTLV-I) infection is a retroviral infection that attacks T-cells, a crucial component of the immune system. It is caused by the HTLV-I retrovirus, which can remain dormant for years but may lead to adult T-cell leukemia/lymphoma and tropical spastic paraparesis. The Human T-Cell Lymphotropic Virus I, II Antibodies Test with Confirmation is the most important test for diagnosis because it detects antibodies confirming infection.

RECOMMENDED TEST Human T-Cell Lymphotropic Virus I, II (HTLV-I/HTLV-II) Antibodies, Preliminary Test W/ Confirmation
Google reviews 505 reviews
$287 $224
What's included
Fast & easy, results by email & SMS
No extra fees paid at the lab
No need to visit a doctor
Private & confidential
No insurance needed
Results explained
Why Private MD Labs?
90-day money-back guarantee Lab order in minutes Save a trip to the doctor Low prices since 2005 Labs within 2 miles

What causes HTLV-I infection?

HTLV-I infection is caused by the Human T-Cell Lymphotropic Virus Type I, a retrovirus that specifically targets and infects T-cells in your immune system. The virus spreads through contact with infected blood, sexual contact with an infected person, breastfeeding from an infected mother, or sharing needles. Once the virus enters your body, it integrates into your T-cells and can remain dormant for many years, sometimes decades, before potentially causing health problems.

What is the best test for HTLV-I infection?

The Human T-Cell Lymphotropic Virus I, II Antibodies, Preliminary Test with Confirmation is the most important test for HTLV-I infection because it detects specific antibodies your body produces in response to the virus. This comprehensive blood test includes both an initial screening and a confirmatory test to ensure accuracy and distinguish between HTLV-I and HTLV-II infections. The test is essential because it can identify infection even when you have no symptoms, allowing for early monitoring and intervention if needed to prevent serious complications like adult T-cell leukemia or neurological disorders.

When should I get tested for HTLV-I infection?

You should get tested if you were born in or have lived in areas where HTLV-I is common, such as Japan, the Caribbean, parts of Africa, or South America. Testing is also important if you have a sexual partner with known HTLV-I infection, received a blood transfusion before 1988, share or have shared needles, or are experiencing unexplable neurological symptoms like leg weakness or bladder problems. Additionally, pregnant women from high-risk areas should get tested to prevent transmission to their baby through breastfeeding.

What are the symptoms of HTLV-I infection?
Most people with HTLV-I infection never develop symptoms and remain healthy carriers throughout their lives. However, in about 3-5% of infected individuals, symptoms may develop after decades of dormancy. These can include progressive leg weakness and stiffness, frequent urination or bladder control problems, lower back pain, and difficulty walking. In rare cases, the virus causes adult T-cell leukemia with symptoms like swollen lymph nodes, skin rashes, fatigue, frequent infections, and unexplained weight loss.
Who is at risk for HTLV-I infection?
People at highest risk include those born in endemic areas like southwestern Japan, the Caribbean islands, Central and South America, sub-Saharan Africa, and parts of the Middle East. Other high-risk groups include people who received blood transfusions before screening began in 1988, individuals who inject drugs and share needles, sexual partners of infected individuals, and children born to infected mothers who were breastfed. Healthcare workers with needle-stick injuries from infected patients also face increased risk.
What happens if HTLV-I infection is left untreated?
While most people with HTLV-I never develop complications, leaving the infection unmonitored can be dangerous for those who do develop symptoms. About 3-5% of infected individuals develop adult T-cell leukemia/lymphoma, an aggressive blood cancer that is difficult to treat and often fatal. Another 2-3% develop tropical spastic paraparesis, a progressive neurological condition causing permanent paralysis and disability. Without regular monitoring, these conditions may not be caught early when treatment options are most effective, leading to poor outcomes and reduced quality of life.
Can HTLV-I infection be diagnosed with a blood test?
Yes, HTLV-I infection is diagnosed through blood tests that detect antibodies your immune system produces against the virus. The standard diagnostic approach uses an initial screening test followed by confirmatory testing to ensure accurate results and distinguish HTLV-I from the related HTLV-II virus. These antibody tests are highly reliable and can detect infection even if you have no symptoms. Blood testing is the only way to definitively diagnose HTLV-I infection since most people never experience symptoms until serious complications develop.
How is HTLV-I infection treated?
There is currently no cure or specific antiviral treatment that eliminates HTLV-I from the body. Most infected people remain healthy and require only regular monitoring with periodic blood tests and physical examinations to watch for complications. If adult T-cell leukemia develops, treatment involves aggressive chemotherapy, sometimes combined with antiviral medications and monoclonal antibody therapy. Tropical spastic paraparesis is managed with corticosteroids to reduce inflammation, physical therapy to maintain mobility, and medications to control bladder symptoms and muscle stiffness.
How can I prevent HTLV-I infection?
You can prevent HTLV-I infection by practicing safe sex with condoms, especially if you or your partner are from endemic areas. Never share needles or drug injection equipment. If you test positive for HTLV-I, avoid donating blood, organs, or tissue, and inform sexual partners of your status. Infected mothers should not breastfeed their babies, as formula feeding eliminates the primary route of mother-to-child transmission. The blood supply in developed countries has been screened since the late 1980s, making transfusion-related infection extremely rare.
What can I do at home to manage HTLV-I infection?
If you have HTLV-I infection, focus on maintaining a healthy immune system through balanced nutrition, regular exercise, adequate sleep, and stress management. Avoid alcohol and smoking, which can weaken immunity and potentially accelerate disease progression. Stay informed about your condition and attend all scheduled medical appointments for monitoring. Keep a symptom diary to track any changes in your health, particularly new neurological symptoms like leg weakness or bladder issues. Consider joining support groups for people with HTLV-I to share experiences and coping strategies.
How’s this work?
Getting your blood test with us is easy, private & backed by the power of science.

Long story short:
  1. In the test options, use the filters or search box to narrow your choices and find the test you want.
  2. If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test.
  3. Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout.
  4. If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want.
  5. When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system.
  6. Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way.
  7. You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy!
  8. If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.
How do I know which test to get?
In the test options, find the test you want. If you’re not sure which test to get, we can lend a hand in finding the right option.

Just text or call us at 754-799-7833, email us at support@privatemdlabs.com, and we'll gladly help you. We've got your back and reply quickly.
Is it possible to make changes to my lab order if I made a mistake with the name, date of birth, or any other details?
Absolutely! We totally understand that errors can happen. No worries, we're here to help you.

Just reach out to us via text at 754-799-7833 or shoot us an email at support@privatemdlabs.com. Remember to include your order number and let us know the correct information you’d like to update. Our awesome team will jump right in and make sure everything is sorted out and accurate for you.

There are no changes necessary if your address is wrong on the requisition though. We don’t mail anything out.

Our lab requires an address to be listed to generate an order.
Do you accept health insurance?
Only HSA & FSA is accepted.

Our services are strictly self-pay and cannot be submitted to your health insurance provider except for Health Savings Accounts or Flexible Savings Accounts.

This policy applies to all insurance companies, including federal health insurance programs like Medicare.

If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com.
Can I cancel my order?
Yes.

We get it – sometimes your needs change.

As long as your samples haven’t been collected yet, we’re happy to help you cancel your order.

If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com.

You can read more about our cancellation policy here.
How can I find a lab location near me?
During the ordering process, you’ll be able to select a specific lab near you, with no strings attached! You can switch it up later easily and visit any of our authorized locations as long as it’s the same lab company you selected your test for (Quest Diagnostics or Labcorp).

Before you proceed with your order, feel free to browse through all our lab locations here. This will give you the peace of mind of knowing that there's a lab nearby your home, office or your favorite gym.

If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.
Here’s how easy it is to get blood work done on your terms
Choose a checkup
Order your test Save a trip to the doctor. Your results will come with clear, friendly explanations. Takes 2 minutes
Book a lab
Book an appointment Visit any of our 4,000 nearby lab locations to have your samples collected. Book or walk-in
Choose a checkup
Get results Receive a clear, easy-to-digest health report by email & SMS within a few business days. Get answers, fast

Here’s why 1,000,000+ customers chose us for affordable hassle-free private blood testing.

You get clinical lab reports & simplified health insights.
Save time & gas, go straight to the lab. Our doctors cover the rest.
Results start landing the next day after your lab visit.*
We don’t sell or share your data. Your time & privacy matter.
US-licensed doctors have your back if things get unclear.
No hidden fees, nice discounts for regular checkups.
Save a trip to the doctor, go directly to the lab
Instant orders, results often overnight*
Results explained in simple language
Reviewed by US licensed doctors
Fast & confidential, we never sell or share your data
No insurance needed, transparent pricing
Demo results
Testosterone 375 ng/dL
Demo results
Normal Optimal 400 - 1000 High
375 ng/dL

What this means

Your testosterone levels are slightly below the optimal range. While this is not necessarily cause for concern, it may contribute to occasional fatigue, reduced motivation, or lower muscle mass over time.

* Regular blood test results (e.g., CBC) typically start arriving the next business day after sample collection. More complex tests, such as hormone panels, may take up to 10–15 business days due to their complexity.

Us vs. Them

Not overhyped or overpriced. Just comprehensive blood testing made simple and for everyone.

* Regular blood test results (e.g., CBC) typically start arriving the next business day after sample collection. More complex tests, such as hormone panels, may take up to 10–15 business days due to their complexity.

1,000,000+ blood tests later, here's what our customers say

Google reviews 505 reviews Next
Human T-Cell Lymphotropic Virus I, II (HTLV-I/HTLV-II) Antibodies, Preliminary Test W/ Confirmation
Google reviews 505 reviews
$287 $224
What's included
Fast & easy, results by email & SMS
No need to visit a doctor
Private & confidential
No insurance needed
Results explained
No extra fees paid at the lab

Sample results

Sample image
For you & your coach Health insights Written in human language, backed by science.
Sample image
For you & your doc Classic lab report A familiar and comprehensive lab report.

Ask Me Anything

Your 24/7 Personal Lab Guide

Quick questions:

Which test is right for my symptoms?
What could be causing this?
When should I get tested?
A

Hi, I'm here to make labs simple, clear, and stress-free. Not sure where to start? That's okay. Tell me what's going on and I'll guide you from there.

I can help you:

  • choose the right test
  • prepare for your lab visit
  • take the next step with confidence and more
Just now
A
Not finding what you need? Text 754-799-7833, we've got you.
We provide helpful guidance, not medical diagnoses. For medical decisions, consult a licensed professional.