Test Details
Mnemonic
IL28B
Ordering Code
3514950
CPT-4 Code(s)
81283
Specimen Information
Patient Preparation
If using saliva sample, patient should not eat, drink, smoke, or chew gum for 30 minutes prior to collection. A previous bone marrow transplant from an allogenic donor will interfere with testing.
Collect
Lavender EDTA
Specimen Preparation
Invert tube several times to mix blood and send 3.0 mL whole blood in original collection tube. Do not aliquot.
Alternate Specimen
Saliva, extracted DNA
Minimum Volume
Whole blood: 3.0 mL
Saliva: 1 swab
Extracted DNA: 100 mcl at a concentration of 75 ng/mcL
Saliva: 1 swab
Extracted DNA: 100 mcl at a concentration of 75 ng/mcL
Transport Temperature
Room temperature
Stability
Whole blood:
Room temperature: 4 days
Refrigerated: 4 days
Frozen: 4 days
Saliva:
Room temperature: 30 days
Refrigerated: 30 days
Frozen: Unacceptable
Extracted DNA:
Room temperature: 1 year
Refrigerated: 1 year
Frozen: 1 year
Room temperature: 4 days
Refrigerated: 4 days
Frozen: 4 days
Saliva:
Room temperature: 30 days
Refrigerated: 30 days
Frozen: Unacceptable
Extracted DNA:
Room temperature: 1 year
Refrigerated: 1 year
Frozen: 1 year
Methodology
Polymerase Chain Reaction (PCR) followed by 5'-Nuclease End-Point Allelic Discrimination Analysis
Reference Range
See report
Performing Laboratory
MAYO
New York DOH Approval Status
Yes