| Web: | mayocliniclabs.com |
|---|---|
| Email: | mcl@mayo.edu |
| Telephone: | 800-533-1710 |
| International: | +1 855-379-3115 |
| Values are valid only on day of printing | |
Test Id : DENGC
Dengue Virus, Molecular Detection, PCR, Spinal Fluid
Useful For
Suggests clinical disorders or settings where the test may be helpful
Suggests clinical disorders or settings where the test may be helpful
Aiding in the diagnosis of central nervous system infection caused by dengue virus
Highlights
Detection of dengue virus nucleic acid in cerebrospinal fluid (CSF) is suggestive of recent exposure or acute central nervous system infection with dengue virus.
The presence of dengue virus nucleic acid in CSF or serum can be used as a marker for acute-phase infection.
Patients with a history of symptoms for more than 1 week may be negative by molecular tests (ie, real-time PCR) and may require serologic testing to confirm the diagnosis of dengue virus infection.
Testing Algorithm
Delineates situations when tests are added to the initial order. This includes reflex and additional tests.
Delineates situations when tests are added to the initial order. This includes reflex and additional tests.
See Mosquito-borne Disease Laboratory Testing in Special Instructions.
Special Instructions
Library of PDFs including pertinent information and forms related to the test
Library of PDFs including pertinent information and forms related to the test
Method Name
A short description of the method used to perform the test
A short description of the method used to perform the test
Real-Time Polymerase Chain Reaction (PCR)
NY State Available
Indicates the status of NY State approval and if the test is orderable for NY State clients.
Indicates the status of NY State approval and if the test is orderable for NY State clients.
Yes
Reporting Name
Lists a shorter or abbreviated version of the Published Name for a test
Lists a shorter or abbreviated version of the Published Name for a test
Dengue Virus, PCR, CSF
Aliases
Lists additional common names for a test, as an aid in searching
Lists additional common names for a test, as an aid in searching
Dengue fever
Break Bone Fever
Flavivirus
Mosquito-borne infection
Arbovirus
Testing Algorithm
Delineates situations when tests are added to the initial order. This includes reflex and additional tests.
Delineates situations when tests are added to the initial order. This includes reflex and additional tests.
See Mosquito-borne Disease Laboratory Testing in Special Instructions.
Specimen Type
Describes the specimen type validated for testing
Describes the specimen type validated for testing
CSF
Ordering Guidance
The presence of dengue virus nucleic acid in cerebrospinal fluid (CSF) or serum (as detected by molecular assays [This test or DENGS / Dengue Virus, Molecular Detection, PCR, 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 PCR) and may require serologic testing (DENVP / Dengue Virus Antibody/Antigen Panel, Serum) to confirm the diagnosis of dengue virus infection.
Specimen Required
Defines the optimal specimen required to perform the test and the preferred volume to complete testing
Defines the optimal specimen required to perform the test and the preferred volume to complete testing
Supplies: Aliquot Tube, 5 mL (T465)
Preferred: 12 x 75-mm screw cap vial
Acceptable: Sterile screw cap vial
Container/Tube: Sterile vial
Specimen Volume: 0.5 mL
Collection Instructions: Do not centrifuge.
Special Instructions
Library of PDFs including pertinent information and forms related to the test
Library of PDFs including pertinent information and forms related to the test
Forms
If not ordering electronically, complete, print, and send a Microbiology Test Request (T244)with the specimen.
Specimen Minimum Volume
Defines the amount of sample necessary to provide a clinically relevant result as determined by the Testing Laboratory
Defines the amount of sample necessary to provide a clinically relevant result as determined by the Testing Laboratory
Reject Due To
Identifies specimen types and conditions that may cause the specimen to be rejected
Identifies specimen types and conditions that may cause the specimen to be rejected
| Heat-inactivated specimen | Reject |
Specimen Stability Information
Provides a description of the temperatures required to transport a specimen to the performing laboratory, alternate acceptable temperatures are also included
Provides a description of the temperatures required to transport a specimen to the performing laboratory, alternate acceptable temperatures are also included
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| CSF | Refrigerated (preferred) | 7 days | |
| Frozen | 7 days |
Useful For
Suggests clinical disorders or settings where the test may be helpful
Suggests clinical disorders or settings where the test may be helpful
Aiding in the diagnosis of central nervous system infection caused by dengue virus
Testing Algorithm
Delineates situations when tests are added to the initial order. This includes reflex and additional tests.
Delineates situations when tests are added to the initial order. This includes reflex and additional tests.
See Mosquito-borne Disease Laboratory Testing in Special Instructions.
Clinical Information
Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test
Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test
Dengue virus (DV) is a globally distributed flavivirus with 4 distinct serotypes (DV-1, -2, -3, -4) and is primarily transmitted by the Aedes aegypti mosquito, 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 DV nucleic acid in cerebrospinal fluid (CSF) is a marker for central nervous system infection caused by this virus. Importantly, the period of time that the virus can be detected in serum and CSF is brief and, therefore, molecular testing should be performed within the first week following onset of symptoms. After this time, serologic testing is the preferred method for diagnosis of DV infection.
Reference Values
Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.
Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.
Negative
Interpretation
Provides information to assist in interpretation of the test results
Provides information to assist in interpretation of the test results
Positive:
The detection of dengue virus nucleic acid in cerebrospinal fluid (CSF) is consistent with acute-phase infection of the central nervous system.
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 CSF is consistent with the lack of acute-phase infection.
Dengue virus nucleic acid may not be detected if the CSF specimen is collected immediately following dengue virus infection (<24-48 hours) and is rarely detectable following 7 days of symptoms.
Cautions
Discusses conditions that may cause diagnostic confusion, including improper specimen collection and handling, inappropriate test selection, and interfering substances
Discusses conditions that may cause diagnostic confusion, including improper specimen collection and handling, inappropriate test selection, and interfering substances
Results should be used in conjunction with clinical presentation and exposure history.
Negative dengue virus (DV) PCR results may occur if the specimen was collected more than 7 days following symptom onset. Serologic testing for the presence of IgM and IgG antibodies to DV is recommended in such cases.
Supportive Data
Assay Inclusivity:
The Altona RealStar Dengue virus RT-PCR assay was tested using control strains of each of the four dengue serotypes, and was able to detect serotypes 1, 2, 3 and 4.
Accuracy:
A commercial panel (SeraCare) of known positive samples for dengue virus serotypes 1, 2, 3, and 4 was tested. Each member of the panel was tested in triplicate, and all replicates were positive by the Altona RealStar Dengue assay.
Thirty analyte-negative CSF samples were spiked (1:10 dilution) with plasma samples collected in South America during an outbreak of dengue virus and determined to be positive for the virus. Of the 30 spiked CSF samples, 29 (97%) were positive by the Altona RealStar Dengue RT-PCR assay.
Limit of Detection:
The limit of detection (LoD) in CSF was determined to be the following:
Dengue serotype 1: 1.4 genomic targets/mcL (700 genomic targets/mL)
Dengue serotype 2: 2 genomic targets/mcL (1000 genomic targets/mL)
Dengue serotype 3: 1.6 genomic targets/mcL (800 genomic targets/mL)
Dengue serotype 4: 1.3 genomic targets/mcL (650 genomic targets/mL)
Reference Range (Analytical Specificity):
20 CSF samples collected for non-infectious diseases testing (eg, chemistry) were analyzed by the Altona RealStar Dengue RT-PCR assay and all 20 were negative.
A cross-reactivity panel of bacteria (n=12), viruses (n=15), and parasites (n=2) was tested, and all were negative by the Altona Dengue RT-PCR assay.
Clinical Reference
Recommendations for in-depth reading of a clinical nature
Recommendations for in-depth reading of a clinical nature
1. Bhatt S, Gething PW, Brady OJ, et al: The global distribution and burden of dengue. Nature 2013;496:504-507
2. Dengue--an infectious disease of staggering proportions. Lancet 2013 Jun 22;381(9884):2136
3. Rigau-Perez JG, Clark GG, Gubler DJ, et al: Dengue and dengue haemorrhagic fever. Lancet 1998;352:971-977
4. Tang KF, Ooi EE: Diagnosis of dengue: an update. Expert Rev Anti Infect Ther 2012;10:895-907
5. Guzman MG, Kouri G: Dengue diagnosis, advances and challenges. Int J Infect Dis 2004;8:69-80
Special Instructions
Library of PDFs including pertinent information and forms related to the test
Library of PDFs including pertinent information and forms related to the test
Method Description
Describes how the test is performed and provides a method-specific reference
Describes how the test is performed and provides a method-specific reference
The Altona Real Star (ARS) DENV is a qualitative, reverse transcription-PCR (RT-PCR) assay targeting the 3' UTR polyprotein gene. The assay includes a heterologous amplification system (internal control) to identify possible RT-PCR inhibition and to confirm the integrity of the reagents of the kit. Specimens are run on the LightCycler 480 following nucleic acid extraction using the NucliSENS EasyMag (BioMerieux). Real-time RT-PCR technology utilizes reverse-transcriptase (RT) reaction to convert RNA into complementary DNA (cDNA), PCR for the amplification of specific target sequences and target specific probes for the detection of the amplified DNA. The probes are labelled with fluorescent reporter and quencher dyes. Probes specific for DENV RNA are labelled with the fluorophore FAM. The probe specific for the Internal Control (IC) is labeled with the fluorophore JOE. Using probes linked to distinguishable dyes enables the parallel detection of DENV specific RNA and the internal control in corresponding detector channels of the real-time PCR instrument.(Package insert: RealStar Dengue RT-PCR Kit 2.0. Altona Diagnostics, Hamburg. 01/2017)
PDF Report
Indicates whether the report includes an additional document with charts, images or other enriched information
Indicates whether the report includes an additional document with charts, images or other enriched information
No
Day(s) Performed
Outlines the days the test is performed. This field reflects the day that the sample must be in the testing laboratory to begin the testing process and includes any specimen preparation and processing time before the test is performed. Some tests are listed as continuously performed, which means that assays are performed multiple times during the day.
Outlines the days the test is performed. This field reflects the day that the sample must be in the testing laboratory to begin the testing process and includes any specimen preparation and processing time before the test is performed. Some tests are listed as continuously performed, which means that assays are performed multiple times during the day.
Tuesday, Thursday
Report Available
The interval of time (receipt of sample at Mayo Clinic Laboratories to results available) taking into account standard setup days and weekends. The first day is the time that it typically takes for a result to be available. The last day is the time it might take, accounting for any necessary repeated testing.
The interval of time (receipt of sample at Mayo Clinic Laboratories to results available) taking into account standard setup days and weekends. The first day is the time that it typically takes for a result to be available. The last day is the time it might take, accounting for any necessary repeated testing.
5 to 8 days
Specimen Retention Time
Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded
Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded
7 days
Performing Laboratory Location
Indicates the location of the laboratory that performs the test
Indicates the location of the laboratory that performs the test
Rochester
Fees
Several factors determine the fee charged to perform a test. Contact your U.S. or International Regional Manager for information about establishing a fee schedule or to learn more about resources to optimize test selection.
Several factors determine the fee charged to perform a test. Contact your U.S. or International Regional Manager for information about establishing a fee schedule or to learn more about resources to optimize test selection.
- Authorized users can sign in to Test Prices for detailed fee information.
- Clients without access to Test Prices can contact Customer Service 24 hours a day, seven days a week.
- Prospective clients should contact their Regional Manager. For assistance, contact Customer Service.
Test Classification
Provides information regarding the medical device classification for laboratory test kits and reagents. Tests may be classified as cleared or approved by the US Food and Drug Administration (FDA) and used per manufacturer instructions, or as products that do not undergo full FDA review and approval, and are then labeled as an Analyte Specific Reagent (ASR) product.
Provides information regarding the medical device classification for laboratory test kits and reagents. Tests may be classified as cleared or approved by the US Food and Drug Administration (FDA) and used per manufacturer instructions, or as products that do not undergo full FDA review and approval, and are then labeled as an Analyte Specific Reagent (ASR) product.
This test was developed, and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.
CPT Code Information
Provides guidance in determining the appropriate Current Procedural Terminology (CPT) code(s) information for each test or profile. The listed CPT codes reflect Mayo Clinic Laboratories interpretation of CPT coding requirements. It is the responsibility of each laboratory to determine correct CPT codes to use for billing.
CPT codes are provided by the performing laboratory.
Provides guidance in determining the appropriate Current Procedural Terminology (CPT) code(s) information for each test or profile. The listed CPT codes reflect Mayo Clinic Laboratories interpretation of CPT coding requirements. It is the responsibility of each laboratory to determine correct CPT codes to use for billing.
CPT codes are provided by the performing laboratory.
CPT codes are provided by the performing laboratory.
87798
Test Setup Resources
Setup Files
Test setup information contains test file definition details to support order and result interfacing between Mayo Clinic Laboratories and your Laboratory Information System.
Test setup information contains test file definition details to support order and result interfacing between Mayo Clinic Laboratories and your Laboratory Information System.
Sample Reports
Normal and Abnormal sample reports are provided as references for report appearance.
Normal and Abnormal sample reports are provided as references for report appearance.
SI Sample Reports
International System (SI) of Unit reports are provided for a limited number of tests. These reports are intended for international account use and are only available through MayoLINK accounts that have been defined to receive them.
International System (SI) of Unit reports are provided for a limited number of tests. These reports are intended for international account use and are only available through MayoLINK accounts that have been defined to receive them.