Rubella Antibody, IgM

Abbrev Code:RUIGM   
Order Code:LAB6358Order Name:Rubella IgM
Synonyms:German Measles Antibody Titer, IgM
Methodology:Chemiluminescent immunoassay
CPT Codes: 86762 x1
Turnaround Time:Performed 3x per week; results are reported the next day.

Collection Instructions

Optimal Volume:2 mL
Minimum\Peds Volume:0.9 mL
Container:Red or gold (gel)
Alternate Containers: Red (no gel)
Causes for Rejection:Gross hemolysis

Processing and Shipping

Specimen Processing:Centrifuge and aliquot 1 mL, 0.35 mL minimum. Store in refrigerator up to 7 days.
Shipping Instructions:Ship at refrigerated temperature.
Stability:CSF accepted
Test Performed at or Referral Lab UM Specialty Core/Prot/Endo (Liaison D) 


Reference Range:
Rubella Antibody, IgM
Less than 20 AU/mL Negative
20-25 AU/mL Equivocal; please recollect
25 AU/mL or greater Positive
Use:Aid in diagnosis of primary rubella infection in pregnant women and congenital rubella infection in neonates. IgM antibodies become detectable in a few days after the onset of signs and symptoms and reach peak levels in 7-10 days. These antibodies persist, but rapidly diminish in concentration over the next 4-5 weeks until the antibody is no longer clinically detectable. The present of IgM antibody in a single specimen suggests that the patient has recently experienced a rubella infection. In most cases, the infection probably occurred within the preceding 1-3 months. Rubella IgM antibody in a newborn's serum suggests congenital infection since IgM from the mother is not transferred to the infant across the placenta. The infected infant, in contrast to a woman with prenatal rubella, may continue to produce rubella-specific IgM for several months.

Click HERE to Report test errors or omissions.
*If no email program is associated with this computer, please contact: for TestID: 1126"