1.0 mL Serum in a SST Gold Top Tube
4 days Ambient
7 days Refrigerated
days Frozen
0.5 mL Serum
| VZV Ab (IgM) | ≤0.90 |
| 0.00-0.90 | Negative |
| 0.91-1.09 | Equivocal |
| ≥1.10 | Positive |
Results from any one IgM assay should not be used as a sole determinant of a current or recent infection. Because an IgM test can yield false positive results and low levels of IgM antibody may persist for more than 12 months post infection, reliance on a single test result could be misleading. If an acute infection is suspected, consider obtaining a new specimen and submit for both IgG and IgM testing in two or more weeks.
1 to 2 days
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