Cytomegalovirus (CMV) OB cascade

Alphabetical Test listing

Cytomegalovirus (CMV) OB cascade-13696

  
Cytomegalovirus (CMV) OB cascade
  
13696
  
LAB13696
  
CMVOB
  
CMV obstetric cascade
  
  • Cytomegalovirus (CMV) IgG
    • If the CMV IgG antibody result is equivocal or positive, regardless of the IgM results, a CMV avidity assay will be referred to LabCorp at an additional charge.
  • Cytomegalovirus (CMV) IgM
  

An aid in the diagnosis of cytomegalovirus (CMV) infection in pregnant females with clinical indications for testing

  
Serum
  

Gold serum separator (SST) tube

  
1.0 mL
  

Immediately following collection, mix sample by gently inverting 5 times

  
  1. Allow sample to clot for a minimum of 30 minutes
  2. Spin within two (2) hours of sample collection
  

Gold serum separator (SST) tube

  

Red serum vial/tube - 5 mL

Red/grey serum separator (SST) vial/tube, 10 mL

  
  1. Allow sample to clot
  2. Spin
  3. Transfer serum to a False bottom plasma/serum transport vial/tube (AHL), labelled as serum, within two (2) hours of sample collection
  

False bottom plasma/serum transport vial/tube (AHL)

Red/grey serum separator (SST) vial/tube, 10 mL

  

Refrigerated (preferred) - 7 days

Ambient - 24 hours

Frozen (OK) 

  
  • Improper labels (unlabeled or mislabeled)
  • Hemolysis (some procedures)
  • Improper anticoagulant or ratio
  • Delay in transport
  • Improper storage temperature affecting results
  • Improper container
  • Leaking container resulting in compromised specimen
  • Quantity not sufficient (QNS)
  
AHL - Immunology: I
  
IgG/IgM: We, Fr
  
1 - 5 days
If reflex testing is indicated, turnaround time will be extended
  

Chemiluminescence Immunoassay (CLIA)

  
IgG
Negative: <0.60 U/mL
Equivocal:   0.60 - 0.69 U/mL
Positive:  ≥ 0.70 U/mL IgG

IgM
Negative: < 30.0 AU/mL
Equivocal:   30.0 - 34.9 AU/mL
Positive:  ≥ 35.0 AU/mL IgM
  
86644 - IgG
86645 - IgM
86644 - IgG avidity (if indicated)
  
07/31/2019
  
03/05/2024
  
01/11/2024