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HHV-7 Quantitative Real-time PCR

Test Code: 7000

Some specimen types for this assay are reported as qualitative results; please see our Specimen Information section below for more information.

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Clinical Utility

HHV-7 is detectable in a variety of transplant settings, both HSCT and solid organ. Direct effects of HHV-7 include fever, rash, myelosuppression, encephalitis, and pneumonitis. Potentially more important are the indirect effects HHV-7 has on CMV disease, invasive fungal disease, and allograft dysfunction. Quantitative HHV-7 DNA PCR can be used to document the presence of the virus as well as track the course of infection.

Procedure

Extraction of HHV-7 viral DNA from specimen followed by amplification and detection using real-time, quantitative PCR. An internal control is added to ensure the extraction was performed correctly and the PCR reaction was not inhibited. This test has not been cleared or approved for diagnostic use by the U.S. Food and Drug Administration.

Specificity

The primers and probes used in this assay are specific for known strains of HHV-7 based on similarity search algorithms. Additionally, no cross reactivity was detected when tested against adenoviruses, BKV, CMV, EBV, HSV-1, HSV-2, HHV-6 variant A, HHV-6 variant B, HHV-8, JCV, parvovirus B19, SV-40, and VZV.

Same day (within 8 - 12 hours from receipt of specimen), Monday through Saturday.

Specimen Type Order Code CPT Code NY Approved Volume Assay Range Special Instructions
BAL 7009 87799 Yes 2 mL (min. 0.5 mL) 72 copies/mL to 1x108 copies/mL
  • Collect in a sterile, screw top tube.
  • Can be shipped at ambient or frozen temperature Monday through Friday.
  • Specimens shipped at ambient temperature must be received within 96 hrs. of collection.
bronch wash 7026 87799 Yes 2 mL (min. 0.5 mL) 72 copies/mL to 1x108 copies/mL
  • Collect in a sterile, screw top tube.
  • Can be shipped at ambient or frozen temperature Monday through Friday.
  • Specimens shipped at ambient temperature must be received within 96 hrs. of collection.
CSF 7003 87799 Yes 2 mL (min. 0.5 mL) 112 copies/mL to 1x108 copies/mL
  • Collect in a sterile, screw top tube.
  • Store frozen and ship on dry ice for overnight delivery.
fecal 7008 87798 Yes Size of pea, or 2 mL liquid stool Detected/Not Detected
  • Collect and place in a sterile, screw top tube.
  • Store frozen and ship on dry ice for overnight delivery.
plasma 7001 87799 Yes 2 mL (min. 0.5 mL) 93 copies/mL to 1x108 copies/mL
  • Collect 4-5 mL whole blood in EDTA or ACD tube.
  • Centrifuge and transfer 2 mL plasma to sterile, screw top tube.
  • Can be shipped at ambient or frozen temperature Monday through Friday.
  • Specimens shipped at ambient temperature must be received within 96 hrs. of collection.
serum 7010 87799 Yes 2 mL (min. 0.5 mL) 93 copies/mL to 1x108 copies/mL
  • Collect 4-5 mL whole blood in red top tube.
  • Centrifuge and transfer 2 mL serum to sterile, screw top tube.
  • Can be shipped at ambient or frozen temperature Monday through Friday.
  • Specimens shipped at ambient temperature must be received within 96 hrs. of collection.
tissue [Qual] 7006 87798 Yes 5 mg fresh tissue (approximately ½ of a pencil eraser size) Detected/Not Detected
  • Place fresh tissue in a sterile, screw top container.
  • The preferred handling is to not add water, saline or other fluid media to the tissue container; however, fluid media filled containers will be accepted for qualitative results.
  • Store frozen and ship on dry ice for overnight delivery.
  • Formalin fixed, paraffin embedded tissue will not be accepted.
tissue [Quant] 7005 87799 Yes 5 mg fresh tissue (approximately ½ of a pencil eraser size) 8 copies/mL to 1x108 copies/mL
  • Place fresh tissue in a sterile, screw top container.
  • Do not add water, saline or other fluid media to container.
  • Store frozen and ship on dry ice for overnight delivery.
  • Formalin fixed, paraffin embedded tissue will not be accepted.
trach asp 7019 87799 Yes 2 mL (min. 0.5 mL) 72 copies/mL to 1x108 copies/mL
  • Collect in a sterile, screw top tube.
  • Can be shipped at ambient or frozen temperature Monday through Friday.
  • Specimens shipped at ambient temperature must be received within 96 hrs. of collection.
trach wash 7048 87799 Yes 2 mL (min. 0.5 mL) 72 copies/mL to 1x108 copies/mL
  • Collect in a sterile, screw top tube.
  • Can be shipped at ambient or frozen temperature Monday through Friday.
  • Specimens shipped at ambient temperature must be received within 96 hrs. of collection.
Shipping

Ship Monday through Friday. Friday shipments must be labeled for Saturday delivery. All specimens must be labeled with patient's name and collection date. A Viracor Eurofins test requisition form must accompany each specimen. Multiple tests can be run on one specimen. Ship specimens FedEx Priority Overnight® to: Viracor Eurofins, 1001 NW Technology Dr, Lee's Summit, MO 64086

Causes for Rejection

Whole blood frozen, specimens beyond their acceptable length of time from collection as listed in the specimen handling, specimens received in trap containers, or specimen types other than those listed.

Specimens are approved for testing in New York only when indicated in the Specimen Information field above.

The CPT codes provided are based on Viracor Eurofins' interpretation of the American Medical Association's Current Procedural Terminology (CPT) codes and are provided for informational purposes only. CPT coding is the sole responsibility of the billing party. Questions regarding coding should be addressed to your local Medicare carrier. Viracor Eurofins assumes no responsibility for billing errors due to reliance on the CPT codes illustrated in this material.

PCR tests are performed pursuant to a license agreement with Roche Molecular Systems, Inc.

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