HAVIgM
Test NameTest ID:
705068
CPT code:
86709
Synonyms:
Anti-HAV, IgM
Antibody to Hepatitis A Virus, IgM
HAVAb, IgM
Clinical Use:
Differential diagnosis of hepatitis; the presence of IgM antibody to hepatitis A virus is good evidence for acute hepatitis A
Test Information:
Hepatitis A virus is a picornavirus, and antibody is made to capsid proteins. Fecal excretion of HAV peaks before symptoms develop. If hepatitis A antibody is IgM, the hepatitis A infection is probably acute. IgM antibody develops within a week of symptom onset, peaks in three months, and is usually gone after six months. Hepatitis A antibody of IgG type is indicative of old infection, is found in almost 50% of adults, and is not usually clinically relevant. Many cases of hepatitis A are subclinical, particularly in children. Presence of IgG antibody to HAV does not exclude acute hepatitis B or other forms of hepatitis.
Specimen Type:
Serum or plasma
Requested Volume:
1 mL
Minimum Volume:
0.4 mL (Note: This volume does not allow for repeat testing.)
Container Type:
Red-top tube, gel-barrier tube, or lavender-top (EDTA) tube
Collection:
If tube other than a gel-barrier tube is used, transfer separated serum or plasma to a plastic transport tube.
Storage Instructions:
Room temperature
Stability Requirements:
Temperature |
Period |
---|---|
Room temperature |
14 days |
Refrigerated |
14 days |
Frozen |
14 days |
Freeze/thaw cycles |
Stable x3 |
Rejection Criteria
Non-EDTA plasma specimen; PST gel-barrier tube
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