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Hepatitis B Core Antibody, IgM

Item Value
Approval req'd? No
Available Stat? No
Test code CORM
Test group Hepatitis
Performed by Immunology
In House Availability Twice per week
Method Chemiluminescent Immunoassay
Container type Gold top
Amount to Collect 1 mL blood
Sample type Serum
Preferred volume 0.5 mL serum
Min. Volume 0.25 mL serum (this volume is insufficient for repeat testing if needed)
Processing notes Refrigerate sample
Normal range Negative
Synonyms HBcAb, IgM; HBV; HBV; anti-HBc; anti-HBcAg
Stability Refrigerated 6 days
Turn around times 1-8 days
Additional information The antibody found earliest in acute HBV infection, IgM will usually be present during the "window" period after HBsAg production has declined to undetectable levels, often before anti-HBs is measurable. It usually persists for up to 6 months, but may occasionally persist for as long as 24 months, or even remain at detectable levels if active virus replication is continuing with chronic hepatitis B infection.

Positive results are automatically forwarded to California public health per regulations. However, this does not absolve the ordering provider from any additional reporting if such is required.
CPT coding 86705
LOINC code 5185-4
Last Updated 5/29/2016 9:46:26 PM
Entry Number 478
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