Dengue IgG, IgM, NS1 (Rapid Test)
- Sample Type
- Serum
- Fasting
- No
- Unit
- Index
Function
The Dengue Rapid Test is a diagnostic panel designed to detect the presence of the Dengue virus or the body's immune response to it. The panel includes three components: NS1 Antigen (a protein released by the virus), and IgM/IgG antibodies (produced by the immune system). This combination allows for detection throughout different stages of the infection, from the first day of symptoms through the recovery phase.
Why it is Ordered
This test is ordered when a patient presents with symptoms suggestive of Dengue fever, especially after traveling to or living in tropical regions. Symptoms include high fever, severe headache, 'breakbone' joint pain, and rash. It is crucial for:
- Early Diagnosis: The NS1 antigen can be detected as early as 1 day after fever onset.
- Staging Infection: Differentiating between a primary infection and a secondary infection (which carries a higher risk of Dengue Hemorrhagic Fever).
- Epidemiological Tracking: Monitoring outbreaks in specific regions.
Associated Conditions
- Primary Dengue Infection: Typically characterized by a positive NS1 and/or IgM, with a negative IgG early on.
- Secondary Dengue Infection: Often shows a rapid and high rise in IgG levels, sometimes even in the absence of IgM. This increases the risk of severe complications.
- Dengue Hemorrhagic Fever (DHF): A severe progression of the disease that requires immediate hospitalization.
Check Your Result
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Enter your lab result to see where you stand compared to the standard reference range.
Why Context Matters
Rapid tests for Dengue can have cross-reactivity with other flaviviruses, such as Zika or Yellow Fever, leading to false-positive IgG or IgM results. Additionally, if the test is taken too early (before day 1 of fever) or too late (after the virus has cleared but before antibodies rise), the result might be a false negative. The 'window period' is critical. A second opinion involving a PCR test (which detects viral RNA) or a repeat serology test 7 days later is often necessary for a definitive diagnosis.
Lab ranges are statistical averages, not biological laws. "Normal" for a 20-year-old male isn't normal for a 60-year-old female.
Clinical References
Source-of-truth databases and clinical guidelines for Dengue IgG, IgM, NS1 (Rapid Test):
Official Sources
- Dengue Fever Testing - Testing.comTesting.com
- Dengue Fever Test: MedlinePlus Medical TestMedlinePlus
Research & Guidelines
Related Indicators
Medically Reviewed by Dr. Binoy Babu, MBBS
Board Certified Doctor • 10+ Years Clinical Experience
Dr. Babu is a practicing physician dedicated to empowering patients with clear, actionable medical information. He founded 2opi to bridge the gap between complex lab reports and patient understanding, ensuring everyone has access to a reliable second opinion.
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