Virus, Direct Detection DFA, Varicella Zoster Virus (VZV)

Virus, Direct Detection DFA, Varicella Zoster Virus(VZV)

CPT Test code: 87290

Test Includes: Direct microscopic examination (nonculture) of virus-infected cells. Quality of specimen may be evaluated.
Related Information:
Specimen: Impression smears of tissues, lesion scrapings and swabs, upper respiratory tract swabs
Volume: Two slides per virus
Container: Plain glass slide, no fixative
Special Instructions: Submit one specimen per test requested. Specify the exact specimen source/origin (eg, skin lesion). Indicate a specific test number on the request form.
Collection: Submit two thinly made air-dried slides. Do not use spray fixative.
Storage Instructions: Refrigerate or maintain specimen at room temperature.
Causes for Rejection: Specimen received after prolonged delay in transport (usually more than 72 hours); unlabeled specimen or name discrepancy between specimen and request label; broken or badly scratched slides; fixative used on slides; bacterial swab transport
Reference Interval: No virus detected
Use: Rapid diagnosis of varicella-zoster virus
References: Drew WL, “Controversies in Viral Diagnosis,” Rev Infect Dis, 1986, 8(5):814-24 (review). PubMed 3024292

Drew WL, “Diagnostic Virology,” Clin Lab Med, 1987, 7(4):721-40 (review). PubMed 3319366

Smith TF, “Rapid Methods for the Diagnosis of Viral Infections,” Lab Med, 1987, 18:16-20.