Weekdays

Approximately 2 weeks (sent to CDC)

Serodiagnosis of Rubella infection

No

3 ml serum or 10 ml vacutainer

Routine blood draw

Acute serum collected as early as possible (within 7-10 days) after onset of illness.

22 or 22A Serology Specimens 

CDD Requisition Form B

Laboratory regulations require the following minimum information to be provided on the requisition form for a specimen to be accepted for testing: Patient name or unique identifier, date and time of collection, patient date of birth and sex, specimen type/site of collection, test request(s), clinician name and UPIN, and address for reporting results. Please be certain that name/identifier on the form matches that on the specimen label which is required to have a minimum of two identifiers.

Store serum specimen at 2-8°C and freeze (-20 to -80°C) within 48 hours of collection. Transport on dry ice.

Category B Shipping

With DHS pre-approval only

Negative, Positive, or Equivocal with interpretation

The presence of Rubella IgM is indicative of a recent exposure, but cannot differentiate between primary infection and vaccination. False-positive IgM serum may occur in persons with parvovirus infection, infectious mononucleosis, or rheumatoid factor.

Rubella Virus PCR VR01725

The absence of IgM and IgG possibly indicates the specimen was collected too early. Consider re-testing in 2-4 weeks.

Rubella IgG Enzyme-Linked Immunosorbent Assay (ELISA) and Rubella IgM Immunoassay performed at CDC

Qualitative assay for the detection of IgG and IgM antibodies to Rubella virus

Laboratory Developed Test (LDT)

No

1-800-862-1065 arbill@slh.wisc.edu