Laboratory Test Guide

Human Herpes 6 Virus Chromosome Integration and Typing

General Information

Lab Name

HHV6 Integration and Typing

Lab Code

HH6ABC

Epic Name

HHV6 Chromosome Integration and Typing

Description

The detection and quantitation of Human Herpesvirus 6 (HHV-6) chromosomal integration and typing. Droplet Digital PCR partitions a single bulk reaction into ~20,000 individual reactions that are each read as positive or negative for DNA template to provide an absolute quantitation of DNA copies without the use of a standard curve. The result of HHV-6 copies/cell is resulted as a ratio obtained by (HHV-6 copies)/(RPP30 copies/2). If the HHV-6 virus to RPP30/2 cell ratio is approximately “one”, results are consistent with HHV-6 chromosomal integration of the virus into the patient cell genome.

This test was developed and its performance characteristics determined by the University of Washington Department of Laboratory Medicine and Pathology. It has not been cleared or approved by the US Food and Drug Administration.

For HHV-6 Quantitation Testing, see HHV6 Quantitative by PCR [HH6QN].

Synonyms

HHV-6, HHV6, HHV6CI

Components

Code	Name
CIHH6A	HHV6 Type A
CIHH6B	HHV6 Type B
HH6VCR	HHV6 Virus to Cell Ratio
HH6CII	HHV6 Chromo Integrat Interp

Interpretation

Method

Droplet Digital PCR

Reference Range

See individual components

Ordering & Collection

Specimen Type

Whole blood

Collection

Blood: 5 mL blood in EDTA (LAVENDER TOP) tube. Send whole blood in room temperature within 24 hours of collection. DO NOT centrifuge, refrigerate, or freeze whole blood.

Also acceptable: 5 mL blood in PPT (PEARL TOP) tube

Unacceptable samples: GREEN TOP, RED TOP or GOLD SST tube. DO NOT centrifuge, refrigerate or freeze whole blood.

DNA Specimens: Extracted DNA specimens are acceptable given that their DNA concentration is between 50–100 ng/μL with a volume of at least 100 μL. Extracted DNA must be stored at -20/-80°C and transported to the lab frozen.

The lab only accepts isolated or extracted nucleic acid from CLIA-certified laboratories or laboratories meeting equivalent requirements as determined by CAP.

Minimum sample requirement: 1 mL whole blood

Handling Instructions

Send whole blood specimens to the Lab immediately at room temperature.

The Laboratory MUST receive the sample within 48 hours of collection. If sample cannot get to the testing laboratory at room temperature within 48 hours, send whole blood at 2-8°C (ice pack).

Extracted DNA must be stored at -20°C to -80°C and transported to the lab frozen.

Quantity

requested: 5 mL whole blood
minimum: 1 mL whole blood

Processing

Blood: Hold whole blood at room temperature and send at room temperature. If sample cannot get to the testing laboratory at room temperature within 48 hours, send whole blood at 2-8°C (ice pack). DO NOT centrifuge, refrigerate, or freeze whole blood.

DNA Specimens: Extracted DNA specimens are acceptable given that their DNA concentration is between 50–100 ng/μl, with a volume of at least 100 μl. Extracted DNA must be stored at -20/-80°C and transported to the lab frozen.

Outside Laboratories: Send whole blood to laboratory at room temperature. If sample cannot get to the testing laboratory at room temperature within 48 hours, send whole blood at 2-8°C (ice pack). Samples greater than 48 hours old may be rejected.

Performance

LIS Dept Code

Virology, Eastlake (EVIR)

Performing Location(s)

Other	Virology, Molecular 206-685-6656 Virology Laboratory, Ste 320 1616 Eastlake Ave E. Seattle, WA 98102