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Dengue Shock Syndrome (DSS) is a life-threatening complication of dengue fever characterized by circulatory collapse, severe plasma leakage, and shock. It is caused by a secondary infection with a different strain of the dengue virus, triggering an excessive immune response that damages blood vessels. The Dengue Fever Antibodies (IgG, IgM) test is the most important test for identifying previous dengue infections that increase DSS risk.
Dengue Shock Syndrome is caused by a secondary infection with a different strain of the dengue virus in people who have previously been infected with another strain. The dengue virus has four distinct strains (DENV-1, DENV-2, DENV-3, and DENV-4), and while infection with one provides lifelong immunity to that specific strain, it actually increases the risk of severe complications during subsequent infections with different strains. When your immune system encounters a second dengue strain, it launches an excessive immune response called antibody-dependent enhancement, which damages blood vessels, causes severe plasma leakage, and leads to circulatory collapse and shock.
The Dengue Fever Antibodies (IgG, IgM) test is the most important test for assessing Dengue Shock Syndrome risk because it identifies whether you have been previously exposed to dengue virus. High levels of IgG antibodies indicate a previous dengue infection, which significantly increases your risk of developing DSS during a secondary infection with a different strain. The test also measures IgM antibodies, which indicate a current or recent infection. This combination helps healthcare providers determine if you are experiencing a dangerous secondary infection that could progress to DSS. While DSS itself is diagnosed through clinical observation of shock symptoms, this antibody test is essential for identifying high-risk patients who need intensive monitoring.
You should get tested if you have been diagnosed with dengue fever before and are experiencing new symptoms like high fever, severe headache, or joint pain, especially if you live in or recently traveled to dengue-endemic areas. Testing is also important if you have current dengue symptoms and a history of previous dengue infection, as this puts you at higher risk for DSS. Get immediate medical attention and testing if you develop warning signs like severe abdominal pain, persistent vomiting, bleeding from gums or nose, rapid breathing, cold or clammy skin, or signs of shock, as DSS can develop rapidly and requires emergency treatment.
What this means
Your test came back negative for dengue IgM antibodies, meaning no evidence of recent or current dengue infection was detected. This is the expected and healthy result if you have not been recently infected with dengue virus.
Recommended actions
Use EPA-registered insect repellent containing DEET when traveling to tropical regions
Wear long sleeves and pants in dengue-endemic areas, especially during dawn and dusk
Eliminate standing water around your home to prevent mosquito breeding
Consider retesting if you develop fever and joint pain after mosquito exposure
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