Viral lesion culture
Viral lesion culture

Tzanck test

Definition:
The Tzanck test is a method of testing for the herpes simplex virus (which causes cold sores, fever blister, or genital sores), or varicella-zoster virus (which causes chickenpox and "shingles").

Alternative Names:
Herpes skin test; Chicken pox skin test

How the test is performed:
The sore is scraped and the scraping is put on a slide and stained. The health care provider then examines it under a microscope.
How to prepare for the test:
Older children and adults:
No preparation is necessary.

Infants and children:
The physical and psychological preparation you can provide for this or any test or procedure depends on your child's age, interests, previous experiences, and level of trust. For specific information regarding how you can prepare your child, see the following topics as they correspond to your child's age:
How the test will feel:
When the sore is scraped or rubbed, there may be mild discomfort.
Why the test is performed:
The test may help diagnose or confirm an infection with 1 of these 2 viruses. This test can not distinguish between these two viruses.
Normal Values:
No presence of herpes infected cells in the scraping is normal.
What abnormal results mean:
The results are immediately available. If there are herpes infected cells present, then the patient has been infected with either:
What the risks are:
There are no risks with this test.
Special considerations:
There is a high rate of false-negative results even when the virus is present.

Review Date: 1/13/2002
Reviewed By: Camille Kotton, M.D., Infectious Diseases Division, Massachusetts General Hospital and Brigham and Women's Hospital, Boston, MA. Review provided by VeriMed Healthcare Network.
A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org). URAC's accreditation program is the first of its kind, requiring compliance with 53 standards of quality and accountability, verified by independent audit. A.D.A.M. is among the first to achieve this important distinction for online health information and services. A.D.A.M. is also a founding member of Hi-Ethics (www.hiethics.com) and subscribes to the principles of the Health on the Net Foundation (www.hon.ch).

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed physician should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. Copyright 2003 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.