HIV-1 Drug Resistance Test: Booking, Price, and Results
About HIV-1 Drug Resistance Test
| Field | Value |
|---|---|
| Also Known As | Human Immunodeficiency Virus (HIV) Genotype Test, HIV-1 Genotypic Resistance Assay, HIV-1 Sequence Analysis, HIV-1 Genotyping, HIV Drug Resistance Genotyping |
| Sample Type | Venous blood (EDTA plasma) |
| Fasting Required | No |
| Report Time | 7 to 21 days (typically 1 to 3 weeks) |
| Recommended For | All genders and ages, including children, with confirmed HIV-1 infection |
| Price | Starting at ₹10,800 |
What Is an HIV-1 Drug Resistance Test?
The HIV-1 Drug Resistance Test is a genetic test that examines the Human Immunodeficiency Virus (HIV) in your blood to identify specific mutations that may reduce how well antiretroviral medications work. It is also called the HIV Genotype Test or HIV-1 Genotypic Resistance Assay. Doctors typically order this test after an HIV-1 diagnosis or when a person's current treatment is not achieving adequate viral suppression. A blood sample drawn from a vein is all that is needed.
What Does an HIV-1 Drug Resistance Test Measure?
The HIV-1 Sequence Analysis examines three key genes in the virus, each linked to a different class of antiretroviral drug. Mutations in these genes can reduce or eliminate a drug's ability to stop the virus from replicating.
The test looks at the following gene regions and their associated drug classes:
| Gene | Enzyme Encoded | Drug Class Affected |
|---|---|---|
| Protease gene | Protease | Protease inhibitors (PIs) |
| Reverse transcriptase gene | Reverse transcriptase | NRTIs and NNRTIs |
| Integrase gene | Integrase | Integrase strand transfer inhibitors (INSTIs) |
Each detected mutation is recorded as a codon change (a specific alteration in the genetic code). These changes are scored and interpreted against published data to estimate resistance levels for individual drugs.
Why Is an HIV-1 Drug Resistance Test Done?
This test is ordered in several specific clinical situations. Understanding when it is needed helps patients and caregivers prepare.
Common Symptoms That May Require This Test
The following situations or findings often prompt a doctor to order the HIV-1 Drug Resistance Test:
- A persistently detectable viral load despite taking antiretroviral therapy
- Treatment failure or a suboptimal response to the current drug regimen
- Viral rebound after a period of successful suppression
- A new HIV-1 diagnosis for baseline assessment before starting treatment
- Rising viral load in a patient known to be taking medications regularly
Conditions This Test Can Help Detect
This test is used to identify and assess the following:
- Acquired drug resistance caused by incomplete viral suppression during treatment
- Transmitted drug resistance, where a newly diagnosed person has already inherited a resistant strain at the time of infection
- Specific mutation patterns that indicate which drug classes are likely to remain effective
- The need to modify or switch an existing antiretroviral regimen
HIV-1 Drug Resistance Test During Pregnancy
The HIV Genotype Test is recommended for all pregnant women with HIV before starting therapy. It is also advised for those who enter pregnancy with a detectable viral load while already on treatment. The goal is to ensure that the chosen drug regimen achieves rapid and complete viral suppression, which protects both the mother and reduces the risk of passing HIV to the baby.
HIV-1 Drug Resistance Test for Chronic Disease Monitoring
For people living with HIV over the long term, the HIV-1 Genotypic Resistance Assay is a routine part of treatment management. If a patient's viral load remains detectable and they are confirmed to be taking their medications correctly, resistance testing should be carried out. Testing is typically repeated whenever virological failure is suspected or when a regimen change is being considered due to treatment failure.
How to Prepare and What to Expect
Preparing correctly for this test helps ensure the sample is suitable for analysis. Here is what you need to know before your appointment.
Do You Need to Fast?
No, fasting is not required before this test. You can eat and drink normally on the day of your sample collection.
Practical Tips Before Your Test
Keep the following points in mind ahead of your appointment:
- Continue taking your current antiretroviral medications as prescribed; the test is best performed while you are still on the treatment that appears to be failing
- Inform your doctor about all antiretroviral medications you have taken, both current and past
- A recent viral load result confirming detectable HIV RNA is usually required before this test is ordered
- Your viral load should ideally be 1,000 copies/mL or above for the test to produce reliable results
Step-by-Step Procedure
The sample collection process is straightforward and similar to a routine blood draw:
- A trained phlebotomist (blood draw specialist) will clean the area on your arm where the blood will be drawn.
- A needle is used to draw blood from a vein, usually at the inner elbow.
- The blood is collected into a special EDTA tube, which prevents the sample from clotting.
- The sample is labelled and prepared for transport to the laboratory.
- If there is any expected delay in reaching the lab, the plasma is separated and kept frozen to maintain sample quality.
- In the laboratory, the sample undergoes PCR amplification followed by genetic sequencing to identify any resistance mutations.
Factors That Can Affect Accuracy
Several factors can influence how reliable the test results are:
- A viral load below 500 to 1,000 copies/mL makes the test unreliable or may cause it to fail entirely
- Stopping antiretroviral therapy more than four weeks before sample collection
- Poor sample handling or delays in freezing the separated plasma
- HIV subtype variation, as some assays are optimised for specific viral subtypes
Understanding Your HIV-1 Drug Resistance Test Results
Results from the HIV-1 Drug Resistance Test are detailed and require careful interpretation by an HIV specialist. The table below outlines the general categories used to report resistance levels.
| Result Category | Meaning |
|---|---|
| Susceptible | No resistance mutations found; the drug is expected to work effectively |
| Low-level resistance | Minor mutations present; drug effectiveness may be slightly reduced |
| Intermediate resistance | Moderate mutations detected; drug effectiveness is significantly reduced |
| High-level resistance | Major mutations present; the drug is unlikely to be effective |
These ranges are general guidelines. Your doctor will interpret your results based on your age, health history, and other factors. Always consult a qualified healthcare professional for personalised medical advice.
Results During Special Conditions
A low viral load (below 500 to 1,000 copies/mL) can cause the test to fail or produce unreliable findings, because the laboratory needs enough virus in the blood to perform sequencing accurately. It is also important to note that a susceptible result does not rule out the presence of a resistant virus hiding in reservoirs elsewhere in the body. Previously identified resistance mutations should always be retained and reviewed alongside new results, as resistance, once it develops, can persist indefinitely in archived viral populations.
How to Maintain Healthy Levels
The following general habits support better treatment outcomes for people living with HIV:
- Take antiretroviral medications at the same time every day, exactly as prescribed, to prevent resistance from developing
- Attend all follow-up appointments so your viral load can be monitored regularly
- Speak to your doctor promptly if you are finding it difficult to stick to your medication schedule
Lupin Diagnostics HIV-1 Drug Resistance Test Price and Home Collection
The HIV-1 Drug Resistance Test is available at Lupin Diagnostics, with prices starting at ₹10,800 depending on the scope of testing and your location. Home sample collection is available.
| City | Approximate Price (₹) |
|---|---|
| Mumbai | ₹21,600 |
| Bengaluru | ₹21,600 |
| Chennai | ₹21,600 |
| Hyderabad | ₹21,600 |
| Kolkata | ₹21,600 |
| Pune | ₹21,600 |
| Ahmednagar | ₹21,600 |
Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
- Select the test on the Lupin Diagnostics website.
- Choose your city and preferred time slot.
- Opt for home sample collection by a certified phlebotomist, or visit your nearest Lupin Diagnostics centre.
- Receive your report via email or WhatsApp within the stipulated turnaround time.
Home Collection
Lupin Diagnostics offers home sample collection for the HIV Drug Resistance Genotyping test across cities, so you can have your blood drawn in the comfort of your home by a trained phlebotomist. All samples are processed in NABL-accredited laboratories, and your digital report is shared directly via email or WhatsApp once ready.
Frequently Asked Questions
The HIV-1 Drug Resistance Test analyses the genetic makeup of HIV in your blood to identify mutations that could make certain antiretroviral drugs less effective. Doctors use the results to select or adjust a treatment regimen that your specific strain of HIV is most likely to respond to.
This test is recommended at the time of a new HIV-1 diagnosis, before starting antiretroviral therapy. It should also be done if treatment appears to be failing, for example, when your viral load is rising despite taking medications regularly.
A plasma viral load of at least 500 to 1,000 copies/mL is generally required for the HIV-1 Genotypic Resistance Assay to produce reliable results. Below this level, the test may not be able to detect mutations accurately.
A routine HIV test tells you whether you have HIV. The HIV Genotype Test is a follow-up test done after diagnosis to find out which antiretroviral drugs are likely to be effective against your particular strain of the virus.
No. You should continue taking your medications as usual. This test is most informative when performed while you are still on the treatment that is failing, or within four weeks of stopping it.
Results from the HIV-1 Drug Resistance Test are typically available within one to two weeks of sample collection. In some cases, particularly for complex analyses, it may take up to three weeks.
Your doctor will review the results alongside your full treatment history and may adjust your antiretroviral regimen to include drugs that the virus remains sensitive to. This helps restore viral suppression and improves long-term treatment outcomes.
HIV-1 Drug Resistance Test
