DENVIRUS IgM Antibody, Serum

What Does This Test Measure?

IgM antibodies are a type of antibody your immune system produces in response to an infection. In the case of dengue virus, these antibodies appear within days to weeks after infection and can remain detectable for several months. This test specifically looks for IgM antibodies that target the virus’s surface proteins, helping to confirm if you’ve recently been infected with dengue.

Why Might This Test Be Ordered?

Your healthcare provider may order this test if you have symptoms like fever, headache, joint or muscle pain, nausea, or rash that could be consistent with dengue fever. It’s also used in people who have traveled to or live in areas where dengue is common, especially if they’ve had recent exposure to mosquitoes.

What Are Common Symptoms?

Dengue fever often starts with sudden onset of high fever, severe headache, and pain behind the eyes. Other symptoms may include joint and muscle pain, nausea, vomiting, and a skin rash that appears 2–5 days after the fever starts. Severe cases can lead to complications like dengue hemorrhagic fever or dengue shock syndrome, which require immediate medical attention.

How Is the Test Performed?

A blood sample is drawn from a vein in your arm. The sample is then sent to a lab where it’s tested for IgM antibodies using an immunoassay method. This process detects the presence of these antibodies without needing to culture the virus.