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Test Code DENGS Dengue Virus, Molecular Detection, PCR, Serum


Ordering Guidance


The presence of dengue virus nucleic acid in serum overlaps with the presence of dengue virus nonstructural protein 1 (NS1) antigen (DNSAG / Dengue Virus NS1 Antigen, Serum). Patients with a history of symptoms for more than 1 week may be negative by molecular tests (ie, real-time polymerase chain reaction) and may require serologic testing (DENVP / Dengue Virus Antibody/Antigen Panel, Serum) to confirm the diagnosis of dengue virus infection.



Specimen Required


Collection Container/Tube:

Preferred: Serum gel

Acceptable: Red top

Submission Container: Sterile container

Specimen Volume: 0.5 mL

Collection Instructions:

1. Within 2 hours of collection, centrifuge and aliquot the serum into a sterile container.

2. Serum specimens not aliquoted from the serum gel collection tube into a sterile container will be rejected.


Useful For

Aiding in the diagnosis of acute infection caused by dengue virus

Method Name

Real-Time Reverse Transcription Polymerase Chain Reaction (RT-PCR)

Reporting Name

Dengue Virus, PCR, Serum

Specimen Type

Serum

Specimen Minimum Volume

0.3 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Refrigerated (preferred) 7 days
  Frozen  7 days

Reference Values

Negative

Reference values apply to all ages.

Interpretation

Positive:

The detection of dengue virus nucleic acid in serum is consistent with acute-phase infection.

 

Dengue virus nucleic acid may be detectable during the first 1 to 7 days following the onset of symptoms.

 

Negative:

The absence of dengue nucleic acid in serum is consistent with the lack of acute-phase infection.

 

Dengue virus nucleic acid may not be detected if the serum specimen is collected immediately following dengue virus infection (<24-48 hours) and is rarely detectable following 7 days of symptoms.

Clinical Reference

1. Bhatt S, Gething PW, Brady OJ, et al. The global distribution and burden of dengue. Nature. 2013;496(7446):504-507

2. Dengue-an infectious disease of staggering proportions. Lancet. 2013;381(9884):2136

3. Rigau-Perez JG, Clark GG, Gubler DJ, Reiter P, Sanders EJ, Vorndam AV. Dengue and dengue haemorrhagic fever. Lancet. 1998;352(9132):971-977

4. Tang KF, Ooi EE. Diagnosis of dengue: an update. Expert Rev Anti Infect Ther. 2012;10(8):895-907

5. Guzman MG, Kouri G. Dengue diagnosis, advances and challenges. Int J Infect Dis. 2004;8(2):69-80

Day(s) Performed

Tuesday, Thursday

Report Available

Same day/1 to 5 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information

87798

LOINC Code Information

Test ID Test Order Name Order LOINC Value
DENGS Dengue Virus, PCR, Serum 7855-0

 

Result ID Test Result Name Result LOINC Value
606372 Dengue Virus, PCR, Serum 7855-0

Forms

If not ordering electronically, complete, print, and send a Microbiology Test Request (T244)with the specimen.