Laboratory Assays in the Clinical Management of Antiretroviral Therapy

  • Author: Mark Holodniy, MD (More Info)
  • Editors in Chief: Daniel R. Kuritzkes, MD; Joseph J. Eron, Jr., MD
  • Last Reviewed: 12/12/17 (What's New)


  • A virtual phenotype is determined using a genotypic test and rules or algorithms to correlate resistance mutations with phenotype
  • After the result of a genotypic resistance test is obtained, the virtual phenotype can be determined within 1-2 days 
  • Cost is significantly less than a true phenotype assay

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