Dengue IgM Test

The Dengue IgM test is designed to detect IgM antibodies that are produced early in the body’s immune response to a dengue virus infection. IgM levels are typically the first to rise—usually 7 to 10 days after exposure—making this test especially useful for identifying current or recent infections.

IgM levels rise rapidly during the acute phase of dengue, remain elevated for a few weeks, and then gradually decline. In many individuals, IgM becomes undetectable after a few months. A positive IgM result suggests a recent infection, particularly when accompanied by a positive IgG result in the same sample.

When IgG is positive but IgM is negative or low, it commonly indicates a past dengue infection. If IgG levels increase four-fold between two samples taken 2–4 weeks apart, it strongly suggests a recent infection, especially secondary dengue.

A negative IgM and IgG result generally means the person does not have a dengue infection, although very early-stage infections may require retesting.

This test is recommended for patients presenting with dengue-like symptoms, those living in outbreak-prone areas, or individuals needing confirmation of recent exposure. The test is simple, requires no fasting, and provides valuable information for diagnosis and clinical decision-making.

Detects IgM-class antibodies produced at the early stage of dengue infection.