Dengue NS1 Antigen Test Price in Bangladesh

✍️ Written by the MedTestBD Editorial Team · Last reviewed: June 2026

What is the Dengue NS1 Antigen Test?

The Dengue NS1 Antigen test is a blood test used to detect dengue virus infection in its early stages. NS1 (Non-Structural Protein 1) is a protein produced by the dengue virus that appears in the blood within the first 1–5 days of infection — before the body has had time to produce antibodies. This makes it the most reliable test for early dengue diagnosis, when other tests may still come back negative.

When Should You Get the NS1 Test?

The NS1 test is most accurate during the first 5 days of fever. If you or a family member develops:

• Sudden high fever (above 38.5°C)
• Severe headache and pain behind the eyes
• Joint and muscle pain ("breakbone fever")
• Skin rash
• Nausea or vomiting

…especially during dengue season (July–November in Bangladesh), get tested immediately. Do not wait to see if the fever subsides on its own.

NS1 vs Dengue IgM/IgG Antibody Test

There are two main types of dengue blood tests:

• NS1 Antigen test: Best for days 1–5 of fever. Detects the virus directly.
• Dengue IgM/IgG antibody test: Best from day 5 onwards. Detects the body's immune response to the virus.

Doctors often order both together to increase diagnostic accuracy. If NS1 is negative but dengue is still suspected after day 5, the antibody test is ordered.

What Happens if NS1 is Positive?

A positive NS1 result confirms active dengue virus infection. Your doctor will monitor your CBC (platelet count) closely — usually every 24–48 hours — as falling platelets are the main danger in dengue fever. Severe dengue (dengue hemorrhagic fever) requires hospitalization.

There is no specific antiviral medication for dengue. Treatment is supportive — rest, adequate fluid intake, and close monitoring. Avoid ibuprofen and aspirin as they can worsen bleeding risk; paracetamol is the recommended fever reducer.

Preparation for NS1 Test

No fasting or special preparation is needed. Blood is drawn from a vein in the arm. Results are usually available within a few hours at most diagnostic centers.

⚠️ This information is for general reference only. Always consult a qualified physician before undergoing any medical test.