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HelpTest Code LAB1235220 Human Immunodeficiency Virus 1 (HIV-1) GenoSure® MG Genotyping
Performing Laboratory
LabCorp
Specimen Required
Lavender-top (EDTA) or plasma preparation tube (PPT™)
Specimen Minimum Volume
5 mL
Specimen Stability Information
Collect specimen in three lavender-top (EDTA) tubes or three PPT™ tubes. Do not use green-top (heparin) tubes. Centrifuge specimen within six hours of collection. Transfer plasma to one or more screw-cap polypropylene transport tube(s). Snap-cap or pop-top tubes should be avoided and may result in specimen rejection. Immediately freeze specimen at -20°C. Do not place samples on dry ice until completely frozen. Specimens collected in PPT™ need to be centrifuged within six hours and frozen. Ship specimens frozen. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.
Reject Due To
PPT™ not centrifuged; insufficient volume; heparinized plasma; nonfrozen specimens; specimens exposed to repeated freeze/thaw cycles
Day(s) Performed
9 - 15 days
Method Name
Polymerase chain reaction (PCR) amplification and DNA sequencing
CPT Code Information
87900
87901
Clinical Information
Detect resistance in HIV-1 to antiretroviral drugs targeted at the reverse transcriptase (nucleoside and nonnucleoside inhibitors) and protease.
Cautions
This procedure may not be successful when the HIV viral load is <500 copies/mL plasma. If there is insufficient virus to produce results, HIV-1 RNA quantitation will be performed to confirm viral load, and the procedure will be billed at the account's prevailing fee.