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Dengue Test (NS1, IgM, IgG): normal range & what your result means

Dengue is diagnosed with different tests depending on the day of illness: NS1 antigen early, then IgM/IgG antibodies. Platelet counts are watched closely.

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Typical adult reference range

Measure	Range
NS1 antigen	Best in days 1–5 of fever
IgM antibody	Positive from ~day 4–5 onward
IgG antibody	Past or secondary infection
Monitor	Platelet count & haematocrit

What a HIGH result can mean

A positive NS1 or IgM supports current dengue; a positive IgG with IgM can indicate a secondary (often more severe) infection

What a LOW result can mean

A negative NS1 late in the illness does not exclude dengue — antibody tests are then more useful

Ranges vary by lab. Reference ranges are TYPICAL ADULT values and vary by laboratory, age, sex, pregnancy and the method used. Always read your result against the range printed on YOUR report, and let your doctor interpret it alongside your history.

Frequently asked questions

Which dengue test should I get and when?

In the first 5 days of fever, the NS1 antigen is best; from around day 4–5, IgM antibodies become positive. Your day of illness decides the right test.

Why are platelets monitored in dengue?

Dengue can lower platelets and leak fluid from vessels, so serial platelet counts and haematocrit help spot warning signs of severe dengue that need hospital care.

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MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.