Days Set Up
Tuesday, Wednesday
Analytic Time

17 - 28 days

Soft Order Code

Test Updated:


Zovirax Resistance
HSV Types 1/2 Phenotyping for Acyclovir Drug Resistance
Acyclovir Resistance HSV (Phenotype)
Herpes Simplex Virus (HSV) Types 1 & 2 Phenotyping for Acyclovir Resistance

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.

Test Overview

Test Methodology

Plaque Reduction Assay

Test Usage

Measures the extent to which various concentrations of acyclovir 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.

Reference Range

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Specimen Requirements

Collection Offsite

Acceptable sites for swab collection include: eye, genital,oral, urethral, vesicle or throat. Refrigerate

Normal Volume
1 swab
Minimum Volume
1 swab

Billing Information

CPT Code
87252, 87253
Pro Fee Code

Have More Questions?

Explore our helpful billing resources:

Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.