Test ID: DNSAG Dengue Virus NS1 Antigen, Serum
Useful For
Aiding in the diagnosis of dengue virus infection
Profile Information
Test ID | Reporting Name | Available Separately | Always Performed |
---|---|---|---|
DENS1 | Dengue NS1 Ag, S | No | Yes |
DNAGI | Dengue Ag Interpretation | No | Yes |
Reporting Name
Dengue Virus NS1 Ag, SSpecimen Type
SerumSpecimen Required
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 0.5 mL
Collection Instructions: Centrifuge and aliquot serum into plastic vial.
Specimen Minimum Volume
0.4 mL
Specimen Stability Information
Specimen Type | Temperature | Time | Special Container |
---|---|---|---|
Serum | Refrigerated (preferred) | 14 days | |
Frozen | 14 days |
Clinical Information
Dengue virus (DV) is a globally distributed flavivirus with 4 distinct serotypes (DV-1, -2, -3, -4). It is primarily transmitted by the Aedes aegypti mosquito, which is found throughout the tropical and subtropical regions of over 100 countries. DV poses a significant worldwide public health threat with approximately 2.5 to 3 billion people residing in DV endemic areas, among whom 100 to 200 million individuals will be infected, and approximately 30,000 patients will succumb to the disease, annually.
Following dengue infection, the incubation period varies from 3 to 7 days, and while some infections remain asymptomatic, the majority of individuals will develop classic dengue fever. Symptomatic patients become acutely febrile and present with severe musculoskeletal pain, headache, retro-orbital pain, and a transient macular rash, most often observed in children. Fever defervescence signals disease resolution in most individuals. However, children and young adults remain at increased risk for progression to dengue hemorrhagic fever and dengue shock syndrome, particularly during repeat infection with a new DV serotype.
Detection of the DV nonstructural protein 1 (NS1) has emerged as an alternative biomarker to both serologic and molecular based techniques for diagnosis of acute DV infection. NS1 antigenemia is detectable within 24 hours and up to 9 days following symptoms onset. This overlaps with the DV viremic phase, and NS1 is often detectable prior to IgM seroconversion. Concurrent evaluation for the NS1 antigen alongside testing for IgM- and IgG-class antibodies to DV (DENGM / Dengue Virus Antibody, IgG and IgM, Serum) provides optimal diagnostic potential for both early and late dengue disease.
Reference Values
Negative
Reference values apply to all ages.
Interpretation
Positive:
The presence of dengue nonstructural protein 1 (NS1) antigen is consistent with acute-phase infection with dengue virus.
The NS1 antigen is typically detectable within 1 to 2 days following infection and up to 9 days following symptom onset.
NS1 antigen may also be detectable during secondary dengue virus infection, but for a shorter duration of time (1-4 days following symptom onset).
Negative:
The absence of dengue NS1 antigen is consistent with the lack of acute-phase infection.
The NS1 antigen may be negative if specimen is collected immediately following dengue virus infection (<24-48 hours) and is rarely detectable following 9 to 10 days of symptoms.
Clinical Reference
1. Bhatt S, Gething PW, Brady OJ, et al: The global distribution and burden of dengue. Nature. 2013 Apr 25;496(7446):504-507
2. Dengue--an infectious disease of staggering proportions. Lancet. 2013 Jun 22;381(9884):2136
3. Rigau-Perez JG, Clark GG, Gubler DJ, Reiter P, Sanders EJ, Vorndam AV: Dengue and dengue haemorrhagic fever. Lancet. 1998 Sep 19;352(9132):971-977
4. Tang KF, Ooi EE: Diagnosis of dengue: an update. Expert Rev Anti Infect Ther. 2012 Aug;10(8):895-907
5. Guzman MG, Kouri G: Dengue diagnosis, advances and challenges. Int J Infect Dis. 2004 Mar;8(2):69-80
Day(s) Performed
Tuesday
Report Available
Same day/1 to 7 daysCPT Code Information
86790
LOINC Code Information
Test ID | Test Order Name | Order LOINC Value |
---|---|---|
DNSAG | Dengue Virus NS1 Ag, S | 75377-2 |
Result ID | Test Result Name | Result LOINC Value |
---|---|---|
DENS1 | Dengue NS1 Ag, S | 75377-2 |
DNAGI | Dengue Ag Interpretation | 69048-7 |
Method Name
Enzyme-Linked Immunosorbent Assay (ELISA)
Test Classification
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.Forms
If not ordering electronically, complete, print, and send Infectious Disease Serology Test Request (T916) with the specimen.
Special Instructions
mml-mosquitoborne