Varicella Zoster Virus (VZV) Antibodies, Quantitative, IgM

TEST: 096776
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CPT: 86787
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Synonyms

  • VZV IgM

Expected Turnaround Time

1 - 4 days

Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.

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Specimen Requirements

Specimen

Serum

Volume

1 mL

Minimum Volume

0.25 mL (Note: This volume does not allow for repeat testing.)

Container

Red-top tube or gel-barrier tube

Storage Instructions

Maintain specimen at room temperature.

Stability Requirements

Temperature

Period

Room temperature

14 days

Refrigerated

14 days

Frozen

14 days

Freeze/thaw cycles

Stable x3

Causes for Rejection

Hemolysis; lipemia; gross bacterial contamination; plasma samples

Test Details

Use

Detect IgM antibodies specific for VZV. These IgM antibodies, if present, can help confirm a diagnosis of VZV acute infection. The IgM response to VZV can be detected at seven days postinfection and usually peaks at 14 days. If a patient presents more than nine days after the appearance of a rash, this assay should not be used. (See Varicella Zoster Virus (VZV) Antibodies, IgG [096206]).

Methodology

Enzyme immunoassay (EIA)

Reference Interval

• Negative: <0.91 index

• Borderline: 0.91−1.09 index

• Positive: >1.09 index

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
096776 Varicella-Zoster Ab, IgM 5404-9 096778 Varicella-Zoster Ab, IgM index 5404-9

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