Dengue PCR test
Quick answer: This blood test looks for the genetic material (RNA) of dengue virus. Doctors may order it in the first few days of fever to confirm dengue, and sometimes to identify the virus type.
- 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 when your fever began
- 2A vein in your arm is cleaned
- 3Blood is drawn into a tube for viral genetic testing
- 4The lab uses PCR to look for dengue virus RNA
What your results can mean
Reading your report
Results are reported as detected or not detected; a negative result later in the illness does not rule out dengue.
If the result is outside the usual range
A detected result confirms dengue virus in the blood and may name the dengue type. Not detected later in the illness does not rule out dengue, as the virus clears from blood within days.
Who usually has this test
People in the first few days of fever when doctors want direct confirmation of dengue or need to know the virus type.
Risks and aftercare
Nothing special for the test; keep up fluids and watch for warning signs.
Names and options
Also called: dengue RNA PCR, dengue RT-PCR
Listed by the hospital as
- DENGUE PCR, EDTA
Questions about this test
How is dengue PCR different from NS1?
Both work early in the illness. PCR detects the virus's genetic material and can identify the dengue type, while NS1 detects a virus protein.
Why does the dengue type matter?
There are four dengue types. Knowing the type is mainly useful for outbreak tracking and in some cases of severe or repeat infection.
When is dengue PCR not useful?
After about the first 5 to 7 days of fever, virus levels fall and PCR may miss it. Antibody tests are better then.
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.