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HelpTest Code HAIGM Hepatitis A Virus IgM Antibody, Serum
Reporting Name
Hepatitis A IgM Ab, SPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Useful For
Diagnosis of acute or recent hepatitis A infection
Method Name
Electrochemiluminescence Immunoassay (ECLIA)
Necessary Information
Date of collection is required.
Specimen Required
Patient Preparation: For 24 hours before specimen collection, patient should not take multivitamins or dietary supplements (eg, hair, skin, and nail supplements) containing biotin (vitamin B7).
Collection Container/Tube: Serum gel (red-top tubes are not acceptable)
Submission Container/Tube: Plastic vial
Specimen Volume: 0.6 mL
Collection Instructions:
1. Centrifuge blood collection tube per manufacturer's instructions (eg, centrifuge and aliquot within 2 hours of collection for BD Vacutainer tubes).
2. Aliquot serum into plastic vial.
Specimen Type
Serum SSTSpecimen Minimum Volume
0.6 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum SST | Frozen (preferred) | 90 days | |
| Refrigerated | 6 days | ||
| Ambient | 72 hours |
Reject Due To
| Gross hemolysis | Reject |
| Gross lipemia | Reject |
| Gross icterus | Reject |
| Heat-inactivated specimen | Reject |
Interpretation
This assay detects the presence of hepatitis A virus (HAV)-specific IgM antibody in serum.
Negative results indicate either inadequate or delayed anti-HAV IgM response after known exposure to HAV or absence of acute or recent hepatitis A.
Equivocal results may be seen in early acute hepatitis A associated with rising anti-HAV IgM levels or recent hepatitis A infection associated with declining anti-HAV IgM levels. Retesting for both anti-HAV IgM (HAIGM / Hepatitis A Virus IgM Antibody, Serum) and anti-HAV Total (HAVTA / Hepatitis A Virus Total Antibodies, Serum) in 2 to 4 weeks is recommended to determine the definitive HAV infection status.
Positive results indicate acute or recent (<6 months) hepatitis A infection. As required by laws in almost all states, positive anti-HAV IgM test results must be urgently reported to state health departments for epidemiologic investigations of possible outbreak transmission.
Day(s) Performed
Monday through Saturday
Report Available
1 to 2 daysTest Classification
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.CPT Code Information
86709
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| HAIGM | Hepatitis A IgM Ab, S | 13950-1 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| HAIGM | Hepatitis A IgM Ab, S | 13950-1 |
Forms
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