The Dengue NS1 Antigen Test is a diagnostic blood test used to detect the non-structural protein 1 (NS1) antigen produced by the dengue virus. It is particularly useful during the early phase of dengue illness, when the antigen may be present in the bloodstream.
Dengue is a mosquito-borne viral infection that can cause fever, headache, body aches, rash, and other symptoms. Early testing can help healthcare professionals assess suspected dengue infection and determine appropriate follow-up.
What Does the Dengue NS1 Test Detect?
- NS1 Antigen: Detects a dengue viral protein associated with current infection.
- Early Dengue Detection: Often useful during approximately the first 7 days after symptom onset.
- Fever Investigation: Supports evaluation of patients with suspected dengue.
- Further Assessment: May be performed alongside dengue IgM or other investigations, depending on the illness stage and clinical findings.
Sample Requirements
- Sample type: Blood, commonly serum or plasma, depending on the validated assay.
- Fasting: Not required.
- Preparation: No special preparation is generally needed.
Understanding Your Results
- Positive: Dengue NS1 antigen was detected, supporting current dengue infection.
- Negative: NS1 antigen was not detected. Dengue may still be present, particularly if testing occurs outside the optimal detection period.
- Invalid: Repeat testing may be required according to the test manufacturer’s instructions.
The choice of follow-up testing depends on the day of illness. Dengue IgM testing may be useful as the illness progresses, while a healthcare professional may recommend other tests when suspicion remains high.
Important Health Information
Seek urgent medical care if dengue is suspected and warning signs develop, including severe abdominal pain, persistent vomiting, bleeding, unusual drowsiness, breathing difficulty, or cold and clammy skin. Do not delay medical evaluation while waiting for test results.
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