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

Test Catalog

Test Name

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

Specimen Type Describes the specimen type validated for testing

WB Sodium Heparin

Advisory Information

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 to utilize this assay.

Additional Testing Requirements

It is important to ascertain the patient's and the donor's cytomegalovirus (CMV) serostatus, as well as the patient's MHC class I HLA haplotype, before ordering this assay; see either:

SSO1 / HLA Class I Molecular Phenotype, Blood

DISI / HLA Class I Molecular Typing Disease Association

Shipping Instructions

Specimens are required to be received in the laboratory weekdays and by 4 p.m. on Friday.

Ship specimen overnight in an Ambient Mailer-Critical Specimens Only (T668).

It is recommended that specimens arrive within 24 hours of draw. Draw and package specimen as close to shipping time as possible.

Specimens arriving on the weekend may be canceled.

Necessary Information

Ordering physician's name and phone number are required.

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.

Supplies: Ambient Mailer - Critical Specimens Only (T668)

Container/Tube: Green top (sodium heparin)

Specimen Volume: 20 mL

Collection Instructions: Send specimen in original tube. Do not aliquot.

Additional Information: For serial monitoring, we recommend that specimen draws be performed at the same time of day. Timing and consistency in timing of blood collection is critical when serially monitoring patients for lymphocyte subsets. See data under Clinical Information.


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

Specimen Minimum Volume The amount of sample necessary to provide a clinically relevant result as determined by the Laboratory.

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




Lithium heparin; Green-top micro tube (lithium heparin)

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

Specimen TypeTemperatureTime
WB Sodium HeparinAmbient48 hours