Quick answer
The Dengue NS1 Antigen Test costs ₹700 at Live Line Health Care. Detects a dengue virus protein in the blood during the first days of fever, before antibodies have had time to appear. No fasting is needed. It uses a blood sample and the report is usually ready the same day.
Also known as: NS1 Antigen, Dengue NS1, NS1 Ag, Dengue Antigen, Dengue Early Detection, Dengue NS1 Ag
What is the Dengue NS1 Test?
The Dengue NS1 Antigen test looks for non-structural protein 1, a protein the dengue virus releases into the blood while it is multiplying. Because it finds the virus’s own protein and not your body’s reaction to it, the test can turn positive from the first day of fever. That makes it the usual choice when someone has had a high fever for a day or two and dengue is going around in the area.
NS1 is most reliable in about the first 5 days of illness, after which levels fall as antibodies appear. A positive result strongly supports dengue. A negative result is less certain, because the test can miss infections, especially a repeat dengue infection or a sample taken late. In that case your doctor may add the Dengue Serology test for IgM and IgG from about day 5. Neither test tells you how severe dengue will become, so a CBC with platelet count is usually followed alongside it.
What it measures: The NS1 protein of the dengue virus, from any of its four types, circulating in the blood.
Parameters included (1)
- Dengue NS1 Antigen
Why is this test done?
- Sudden high fever in the first 1 to 5 days during dengue season
- Fever when a family member or neighbour has recently had dengue
- Finding dengue early, so fluids, platelets and warning signs can be watched closely
- Early fever with low platelets or low white cells on a CBC
- Fever after travel to an area with a dengue outbreak
When should you get tested?
- Sudden high fever, sometimes with chills
- Severe headache, especially behind the eyes
- Muscle, bone and joint pain
- Nausea, vomiting and poor appetite
- Flushed skin or a fine rash
How to prepare for the Dengue NS1 Test
- 1Book as early as you can, ideally within the first 5 days of fever.
- 2No fasting is needed. Keep taking water, ORS or other fluids unless your doctor advises otherwise.
- 3Tell the staff which day the fever began, so it can be considered with the result.
- 4Ask a doctor what to take for fever. Paracetamol is the usual choice, and aspirin, ibuprofen and diclofenac are generally avoided in suspected dengue because of bleeding risk. If you already take prescribed aspirin or a blood thinner, do not stop it yourself. Speak to your doctor the same day.
Dengue NS1 Test normal range
| Parameter | Typical reference range |
|---|---|
| Expected result | Negative (non-reactive): NS1 antigen not detected |
| Positive (reactive) | NS1 antigen detected, which supports current dengue infection |
This is a detected or not-detected test, though some methods also print an index with a cut-off. A negative result does not rule out dengue if your symptoms fit, and your report’s own wording takes precedence. Ranges are typical adult values and vary between labs, age and sex. Always use the range printed on your report and discuss results with your doctor.
Understanding your results
- A positive NS1 supports current dengue even when antibodies are still negative. Your doctor will guide how often to repeat platelets and packed cell volume.
- A negative NS1 is not an all-clear, particularly after day 5 or in someone who has had dengue before.
- A positive NS1 does not predict who will become seriously ill. Most people recover with rest, fluids and monitoring.
- The most dangerous phase often comes as the fever drops, usually between days 3 and 7, so a falling temperature is not proof that you are safe.
- Seek hospital care immediately for stomach pain that is severe or constant, vomiting that will not stop, bleeding of any kind, breathlessness, cold or pale hands and feet, extreme tiredness, irritability, or no urine for 4 to 6 hours.
Health packages that include this test
The Dengue NS1 Test is included in these full body checkups:
Book the Dengue NS1 Test in your city
Same price at all 45 centres. Choose your city for local centres and timings.
Telangana
Dengue NS1 Test – FAQs
What is the price of the Dengue NS1 Test?
The Dengue NS1 Antigen Test costs ₹700 at Live Line Health Care, at all 45 centres and for home sample collection.
How many days after fever should the NS1 test be done?
The test can be done from the first day of fever and works best up to about day 5. After that the protein level drops while antibodies rise, so doctors usually prefer dengue IgM and IgG serology for a later sample.
What does NS1 positive mean?
It means dengue virus protein was found in your blood, which strongly supports a current infection. See a doctor the same day. They will advise on fluids, fever control and repeat blood counts. The result alone does not say how serious the illness will be.
Can the NS1 test be negative even if I have dengue?
Yes. The test can miss dengue, particularly in a repeat infection, when antibodies clear the protein faster, or when the sample is taken after the first several days of fever. Doctors judge symptoms and blood counts too, and may order serology.
NS1 or dengue IgM: which test should I take?
It depends on the day of your illness. In the first 5 days NS1 is usually the better choice, and from about day 5 IgM becomes more useful. Around that overlap, or when the timing is unclear, doctors may ask for both.
When does dengue become an emergency?
Dengue becomes an emergency when warning signs appear, often as the fever settles. These include strong stomach pain, constant vomiting, any bleeding, breathlessness, cold skin, drowsiness and very little urine. Do not wait at home or book another test. Go to a hospital straight away.
Does a positive NS1 mean I need a platelet transfusion?
No. Most people with dengue recover without any transfusion. Doctors decide on platelets based on bleeding and overall condition, not on an NS1 result. Your platelet count is still worth tracking, because it shows how the illness is moving day by day.
Where can I get the Dengue NS1 Test done?
At any of our 45 Live Line Health Care centres in 40 cities across Andhra Pradesh and Telangana, including Hyderabad, Visakhapatnam, Warangal, Kakinada and Nellore, or book home sample collection.
Medical disclaimer: This information is for general awareness only and is not a substitute for professional medical advice. Please consult a qualified doctor to interpret your results and before starting or changing any treatment.