Foscarnet Resistance HSV (Phenotype)

CPT: 87252; 87253
Print Share

Test Details


  • Foscavir® Resistance
  • Herpes Simplex Types 1 and 2 Virus Phenotyping for Foscarnet Drug


This test method uses a plaque reduction assay. It measures the extent to which various concentrations of foscarnet inhibit the growth of virus in cell culture. The concentration of drug which results in a 50% reduction in plaque formation induced by viral cytopathic effect (CPE) versus the no-drug control establishes an inhibitory dose (ID-50) drug concentration reportable value.

Specimen Requirements


Actively-growing isolate (preferred) or eye, genital, oral, urethral, vesicle, or throat swab


One tube with media or one swab


Isolate in tube with media capped tightly or swab in viral transport media

Storage Instructions

Maintain isolate at room temperature. Refrigerate viral transport media with swab.


Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
138362 HSV Foscarnet Resistance 256-8 138363 ID 50 = ug/mL 256-8

For Providers

Please login to order a test.


© 2019  Laboratory Corporation of America® Holdings and Lexi-Comp Inc. All Rights Reserved.

CPT Statement/Profile Statement

The LOINC® codes are copyright © 1994-2018, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at Additional information regarding LOINC® codes can be found at, including the LOINC Manual, which can be downloaded at