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).
18 - 23 days
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.
Test sent to Mayo Medical Laboratories; performed by Monogram Biosciences.