Dengue NS1 antigen test
Quick answer: A dengue NS1 test looks for a protein of the dengue virus in your blood. It is most useful in the first few days of fever. Doctors order it when you have a fever with body aches, headache or rash and dengue is suspected, usually within the first 5 days.
- SampleBlood
- TakesAbout 5 minutes
- Before the testNo special preparation is usually needed.
- In fertility careDengue in pregnancy needs close monitoring, so tell your doctor if you are pregnant and have a fever.
How the test is done
- 1A nurse notes how many days you have had fever
- 2A vein in your arm is cleaned
- 3A needle draws a tube of blood
- 4The lab or a rapid card tests for the dengue NS1 protein
What your results can mean
Reading your report
A negative NS1 does not fully rule out dengue, especially after the first few days, so your doctor may add antibody tests and platelet counts.
If the result is outside the usual range
A positive NS1 can point to dengue in the first days of fever. A negative result does not rule out dengue, especially after day 5 or in a repeat dengue infection.
Who usually has this test
People in Bangalore and other dengue areas with sudden high fever, headache, body pain or rash, especially during and after the monsoon.
Risks and aftercare
Nothing special after the blood draw; drink plenty of fluids and watch for warning signs as advised.
Names and options
Also called: NS1, dengue NS1, dengue antigen test, NS1 ELISA, NS1 rapid test
Options
- CLIA
- ELISA
- Rapid test
Listed by the hospital as
- DENGUE NS1 CLIA
- DENGUE NS1 ANTIGEN ELISA, SERUM
- DENGUE NS1 ANTIGEN, RAPID TEST
Questions about this test
When should the dengue NS1 test be done?
NS1 is best done in the first 1 to 5 days of fever. After that, dengue IgM antibody tests become more useful. Your doctor will also watch your platelet count.
What warning signs should I watch for with dengue?
Seek care quickly for severe belly pain, repeated vomiting, bleeding gums, black stools, extreme tiredness or restlessness. These are often seen as the fever falls.
Can I take painkillers for dengue fever?
Ask your doctor before taking any medicine. Some common painkillers can raise the risk of bleeding, so paracetamol is often preferred.
Related tests
Tamara Hospital & IVF Centre, Rajajinagar
34/3, 10th Cross Road, opp. Vardhaka Sardar Patel School, 1st N Block, 2nd Stage, Rajajinagar, Bengaluru 560010
The hospital is open 24 hours. Call before you come to check the timing for your scan or sample collection.
Get directions ↗IVF Pulse fertility care at Tamara Hospital →
Reception
Waiting area
IVF lab
This page explains each test in general terms so you know what to expect. It is not medical advice: your doctor decides which tests you need and what your results mean. Reference ranges differ between laboratories. Updated 4 November 2026.