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Test Code: Rubg Preferred Name Rubella antibody

No
1 hour
Daily
1 day
Non-medicare Item
N/A

Test Tubes

ImageSpecimen TypeSpecimen VolumeTube Type
Blood (adult)8 mLSST with gel 8.5 mL (Dark Yellow Top)
Blood (paediatric)2 mL4x SST with gel 600 uL Paed (Red or Yellow top)
--No collection notes--


APPLICATION:  Rubella IgM antibodies becomes positive 7 days after the onset of the illness but is usually undetectable after 8 weeks.

INTERPRETATION:  A x4 fold rise in IgG titre is evidence of recent infection.
Rubella IgM in a neonate is suggestive of congenital infection but false postive and false negative results occur.
Viral Culture/Rubella PCR is a definitive method of diagnosing congential infection as the virus is present in throat, conjunctiva, blood and urine.
Viral Culture/Rubella PCR is performed at Westmead NSW.

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