CMVC8 - Specimen: Cytomegalovirus (CMV) CD8 T-Cell Immune Competence, Quantitative Assessment by Flow Cytometry

Test Catalog

Test ID: CMVC8    
Cytomegalovirus (CMV) CD8 T-Cell Immune Competence, Quantitative Assessment by Flow Cytometry

Specimen Type Describes the specimen type needed for testing

WB Sodium Heparin

Specimen Required Defines the optimal specimen. This field describes the type of specimen required to perform the test and the preferred volume to complete testing. The volume allows automated processing, fastest throughput and, when indicated, repeat or reflex testing.

Specimens are required to be received in the laboratory weekdays and by 4 p.m. on Friday. It is recommended that specimens arrive within 24 hours of draw. Specimens arriving on the weekend may be canceled. Draw and package specimen as close to shipping time as possible.


Container/Tube: Green top (sodium heparin)

Specimen Volume: 20 mL

Collection Instructions: Send specimen in original tube. Do not aliquot. Ship specimen overnight in an Ambient Mailer-Critical Specimens Only (Supply T668).

Additional Information:

1. Ordering physician's name and phone number are required.

2. Patient must be cytomegalovirus (CMV)-seropositive and have 1 or more of the 5 major histocompatibility complex (MHC) alleles: HLA A1, A2, B7, B8, or B35. (Suggested assay for HLA typing is SSO1 / HLA Class I Molecular Phenotype, Blood.)

3. For serial monitoring, we recommend that specimen draws be performed at the same time of day.

Forms: Quantitative CMV Immune Competence Assay Patient Information (T592) in Special Instructions.

Specimen Minimum Volume Defines the amount of specimen required to perform an assay once, including instrument and container dead space. Submitting the minimum specimen volume makes it impossible to repeat the test or perform confirmatory or perform reflex testing. In some situations, a minimum specimen volume may result in a QNS (quantity not sufficient) result, requiring a second specimen to be collected.

10 mL

Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected


Mild OK; Gross reject


Mild OK; Gross reject





Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the laboratory. Alternate acceptable temperature(s) are also included.

Specimen TypeTemperatureTime
WB Sodium HeparinAmbient48 hours