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Serology

Dengue Virus NS1

A Dengue NS1 test detects the NS1 (non-structural protein 1) antigen of the dengue virus in your blood. This test is particularly useful for early detection during the first few days of illness, before antibodies have developed.

Doctor's Assessment Included

What It Measures

This test detects the NS1 antigen, a viral protein secreted by dengue virus-infected cells during the acute phase of infection. NS1 can be detected in the blood from the first day of fever onset up to approximately nine days. The test provides a qualitative result indicating whether the NS1 antigen is present.

Why It Matters

The NS1 test enables early diagnosis of dengue infection, even before the immune system has produced detectable antibodies. Early detection allows for timely clinical management and monitoring for complications. This is especially important in dengue-endemic regions where prompt diagnosis can guide appropriate care. Results should be interpreted by a healthcare professional.

When to Test

Testing is most valuable during the first one to five days of fever onset in individuals who have recently visited dengue-endemic areas. The NS1 antigen may become undetectable after approximately nine days. Consult a healthcare professional for guidance on testing timing.

Lifestyle Tips

Take preventive measures against mosquito bites in endemic areas. If you develop sudden high fever after travelling to a dengue-endemic region, seek medical attention promptly. Stay hydrated and avoid self-medication with aspirin or ibuprofen. Rest and monitor your symptoms closely during the acute phase.

Frequently Asked Questions

How is the NS1 test different from dengue antibody tests?
The NS1 test detects a viral protein produced during active infection, making it useful for early diagnosis within the first days of illness. Antibody tests (IgM and IgG) detect the immune system's response to the virus, which takes longer to develop. The NS1 test is most valuable in the early acute phase, while antibody tests become more useful later.
Can the NS1 test be negative even if I have dengue?
Yes, the NS1 antigen may become undetectable after approximately five to nine days of illness. If your symptoms persist and dengue is still suspected, your healthcare professional may recommend antibody testing (IgM or IgG) for a more complete assessment.

Tests with related values

These panels measure values from the same category as this marker.

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