Cytomegalovirus (CMV) OB cascade-13696

Test info

  
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

Specimen

  
Serum
  
  
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

  
  
  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
  
  

Refrigerated (preferred) - 7 days

Frozen - 1 month

  
  • 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)

Performance

  
AHL - Immunology: I
  
IgG/IgM: Mo, We, Fr
  
1 - 4 days
If reflex testing is indicated, turnaround time will be extended
  

Chemiluminescence Immunoassay (CLIA)

Clinical and Interpretive info

  
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

Billing

  
86644 - IgG
86645 - IgM
86644 - IgG avidity (if indicated)

Tracking

  
07/31/2019
  
08/19/2019
  
02/17/2020