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Rubella Antibody, IgG

Item Value
Approval req'd? No
Available Stat? No
Test code RUBI
Performed by Immunology
In House Availability Monday, Wednesday and Friday (Day Shift)
Method Chemiluminescent Immunoassay
Collection Instructions Avoid hemolysis
Container type Gold top
Amount to Collect 1 mL blood
Sample type Serum
Preferred volume 0.5 mL serum
Min. Volume 0.2 mL serum
UCSF Rejection Criteria Grossly hemolyzed, lipemic or icteric samples
Processing notes Freeze sample at -20C
Units Index
Normal range
Negative / Not-immune < 0.90
Equivocal 0.90 – 0.99
Positive / Immune > 1.00

Synonyms Prenatal screening; TORCH Antibodies; German measles
Turn around times 1-4 days
Additional information For occupational or early post-exposure screening, a single specimen is generally sufficient to determine immunity to rubella infection. An EQUIVOCAL result may not provide sufficient protection from clinical illness upon exposure to rubella virus.

When congenital infection is suspected, an initial negative result most likely excludes the diagnosis. If the result is positive in the initial specimen, a second sample should be submitted 3 months later to distinguish transplacentally-transmitted maternal antibody from congenital infection.

See also entry for Rubella Culture and table for Viral Serology. Acute cases of rubella should show a rise in antibody from an initially negative or equivocal level.
CPT coding 86762
LOINC code 25514-1
Last Updated 8/15/2017 12:23:38 PM
Entry Number 834
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