Dengue antibody (IgM and IgG) test
Quick answer: This blood test measures antibodies against dengue virus. IgM usually appears about 4 to 5 days after the fever starts. Doctors order it when dengue is suspected after the first few days of fever, often together with NS1.
- 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 records the day of your fever
- 2A vein near your elbow is cleaned
- 3A needle draws a tube of blood
- 4The lab tests for dengue IgM and IgG antibodies
What your results can mean
Reading your report
A positive IgM usually suggests a recent or current infection and a positive IgG a past infection or immunity, but your doctor will read the result alongside your symptoms. A positive IgG with IgM can suggest a repeat dengue infection.
If the result is outside the usual range
A positive IgM can point to a recent dengue infection, usually from about day 5 of fever. A positive IgG with IgM can suggest a repeat infection, and IgG alone often means a past infection.
Who usually has this test
People with fever for more than about 4 to 5 days where dengue is suspected, often tested with NS1.
Risks and aftercare
No special aftercare; keep drinking fluids and follow your doctor's advice on platelet checks.
Names and options
Also called: dengue IgM, dengue IgG, dengue antibody
Options
- IgM (CLIA)
- IgG
- IgM
Listed by the hospital as
- DENGUE IGM CLIA
- DENGUE IGG ANTIBODY, SERUM
- DENGUE IGM ANTIBODY, SERUM
Questions about this test
Why is dengue IgM negative early in fever?
IgM usually appears around 4 to 5 days after the fever starts. Earlier on, the NS1 antigen test is more useful.
Is a second dengue infection more serious?
A second infection with a different dengue type can carry a higher chance of severe dengue. Your doctor will watch you more closely.
Can dengue IgG be positive from an old infection?
Yes. Dengue IgG can stay positive for years, so on its own it often reflects a past infection.
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.