90545:VARICELLA ZOSTER VIRUS (VZV) ANTIBODY, IgM

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90545:VARICELLA ZOSTER VIRUS (VZV) ANTIBODY, IgM
Alias Names: VZV Ab IgM / Chicken Pox IgM
Methodology: Enzyme-Linked Immunosorbent Assay (ELISA)
Edit Date: 6/11/2010
Performed: Monday-Friday
Released: 1-5 days after setup at PeaceHealth Laboratories’ reference lab.
CPT Code: 86787-90
Specimen Collection Details
Collection: One 7.5 mL serum separator tube (SST).
Handling: Allow to clot, centrifuge and separate serum from cells into a screw-cap plastic vial. Refrigerate.
Stability: 48 hours ambient, 14 days refrigerated, or 1 year frozen.
Standard Volume: 1 mL serum.
Minimum Volume: 100 µL serum.
Transport: Refrigerated.
Rejection Criteria: Severly lipemic, icteric, contaminated, heat-inactivated, or hemolyzed specimen.

Evaluation of recent infection:
Varicella Zoster Virus Antibody, IgM. For additional information, refer to individual test.
≤0.90 ISR
Negative: No significant level of detectable varicella-zoster virus IgM antibody.
0.91-1.09 ISR
Equivocal: Repeat testing in 10-14 days may be helpful.
≥1.10 ISR
Positive: Significant level of detectable Varicella-Zoster Virus IgM antibody. Indicative of current or recent infection. However, low levels of IgM antibodies may occasionally persist for more than 12 months post-infection or immunization.
ISR=Immune Status Ratio