Understanding Dengue Testing: NS1, IgG & IgM – What They Mean & Why Timing Matters

Mumbai’s monsoon brings a rise in mosquito-borne diseases, especially Dengue. When fever strikes, doctors often recommend Dengue NS1, IgG, and IgM tests — but most people don’t know what these mean or why they matter.

We believe in early detection, clarity, and education at Panacea Care Diagnostics, Dadar. Here’s what you must know before getting tested.

1. What is the Dengue NS1 Antigen Test?

The NS1 (Non-Structural Protein 1) Antigen test detects the actual Dengue virus antigen in the blood — NOT antibodies.

When is it useful?

• Day 1 to Day 5 of fever (acute phase)

• Detects the infection before your body starts producing antibodies

Why it’s critical:

• Fast detection

• Indicates active infection

• Helps doctors begin early treatment and monitor platelet levels

Think of NS1 as the “early warning signal” — the virus is still multiplying.

2. What are Dengue IgM and IgG Antibody Tests?

When your immune system fights dengue, it produces antibodies — IgM and IgG — at different stages.

Dengue IgM

• Appears around Day 5–7 of infection

• Peaks in 2 weeks, declines after 1–3 months

• Indicates a recent or primary infection

Dengue IgG

• Appears after IgM, usually around Day 7 onward

• Remains in blood for months or years

• A positive IgG without IgM may indicate past infection or secondary dengue

What Do Different Results Mean?

NS1 IgM IgG Likely Interpretation

+ - - Early acute infection (Day 1–5)

- + - Recent infection (Day 5–10)

- + + Current infection; may be secondary dengue

- - + Past infection (or secondary exposure)

Why This Matters for You? "Timing is everything."

If you test too early or too late with the wrong test, it may give false negatives or confusing results.

At PCD Lab, our doctors ensure:

• Correct test based on symptom timeline

• No unnecessary retesting

• Fast, clear, and doctor-reviewed reports

Why Panacea Care Diagnostics for Dengue Testing?

Doctor-Led Lab – Ethical & Transparent

75000+ Patients Trust Us

Monsoon Fever Smart Panels Available

Same-Day Reports

6-Hour Guarantee on Fever Results or Money Back

Home Collection

References & Medical Sources:

1. World Health Organization (WHO) – Dengue: Guidelines for Diagnosis, Treatment, Prevention and Control

https://www.who.int/publications/i/item/9789241547871

2. CDC (Centers for Disease Control and Prevention) – Dengue Laboratory Guidance

https://www.cdc.gov/dengue/clinic-lab/laboratory.html

3. Vaughn DW, Green S, et al. – “Dengue viremia titer, antibody response pattern, and virus serotype correlate with disease severity.” J Infect Dis. 2000; 181(1):2–9.

Get Tested the Right Way

Panacea Care Diagnostics – Dadar

Call / WhatsApp: 9623265391

Ask for the Dengue Smart Panel (NS1 + IgM + IgG + CBC)