18 - 23 days
Looking to order a test?
We’ve provided helpful links to make ordering easy.Find a Requisition
All specimens should be accompanied by a requisition.Submitting Specimens
Learn about how to properly label and where to ship specimens.Order Kits and Supplies
MLabs provides all the supplies necessary for the collection of specimens.Test FAQ
Visit our provider FAQ and learn about common questions to ordering tests.
CD4 cell culture assay for phenotypic recombinant-virus co-receptor tropism.
Phenotypic determination of the type of co-receptor (CCR5, CXCR4, or both) used by the patient's HIV-1 strain to enter host CD4+ cells (HIV-1 entry co-receptor tropism).
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Collect specimen in a lavender top or PPT (pearl top) tube. Centrifuge, aliquot plasma into a plastic vial within 2 hours of collection and freeze.