Interpret Your Dengue IgM Antibody Results
Enter your Dengue IgM value below and get an instant, free AI interpretation — a plain-English explanation checked against WHO/IFCC reference ranges.
Medical Disclaimer
This AI-generated interpretation is for educational purposes only and does not constitute medical advice, diagnosis, or treatment. Results may vary based on individual health factors not captured here.
Always consult a qualified healthcare professional before making any health decisions. Read full disclaimer →
Dengue IgM Antibody Normal Ranges
Dengue IgM antibody appears 4–5 days after the onset of dengue fever and persists for 2–3 months.
| Reference Range | Unit | Notes |
|---|---|---|
| Negative / Non-reactive | qualitative | Negative = no recent infection; Positive = recent dengue |
Also reported in: index value.
Why Doctors Order the Dengue IgM Antibody Test
Dengue IgM is the primary serological marker for recent/current dengue. Because many dengue infections occur in settings where PCR is unavailable, IgM serology combined with NS1 antigen testing is the standard WHO-recommended diagnostic approach.
How to Enter Your Dengue IgM Result
Dengue IgM Antibody is usually reported as a qualitative result — for example negative or positive — so enter it exactly as it is printed on your lab report. Some laboratories also report a numeric value (index value); if yours does, choose the matching unit.
What a Negative or Positive Dengue IgM Result Can Mean
Negative (non-reactive) result
- Testing too early (Day 1–3 of fever — NS1 is positive before IgM appears)
- Secondary dengue (IgM may be low/absent; IgG rises much faster and higher)
- Immunocompromised patients may have blunted IgM responses
Positive (reactive) result
- Active dengue infection (detectable from Day 4–5 of fever)
- Recent dengue infection (persists for 2–3 months after recovery)
These are common associations, not a diagnosis. A single result is read alongside your symptoms, history and other tests — discuss it with your doctor.
What Can Change Your Dengue IgM Result
Before you read too much into a result, consider whether any of these applied:
- Cross-reactivity with other flaviviruses: Zika, West Nile, Yellow Fever, Japanese Encephalitis — all can produce positive dengue IgM in some assays
- Vaccination for Yellow Fever or Japanese Encephalitis can cause a positive dengue IgM on some assays
- Secondary dengue infection: IgM is low/absent; IgG predominates
- Sample hemolysis can affect some ELISA-based dengue assays
Preparing for the test: Dengue IgM is best tested from Day 5 onwards after fever onset. Collect a convalescent serum sample if initial testing (Day 1–4) was done.
Symptoms That Often Prompt Dengue IgM Testing
- Fever, headache, myalgia, joint pain (dengue fever)
- Rash (maculopapular, typically Day 3–5)
- Thrombocytopenia (low platelets)
- Severe dengue warning signs: abdominal pain, persistent vomiting, bleeding, rapid breathing, altered consciousness
Want the full clinical guide to Dengue IgM Antibody?
Reference ranges, causes, symptoms, preparation, and FAQs.