Laboratory Test Detail

Last Updated: May 18, 2024 @ 9:13 am


West Nile Antibody, IgM

  • One SST

Also Acceptable:
  • One Red Top
  • 1 mL (Min:0.5 mL) Serum . Submit Refrigerated. Submit in a Standard Transport Tube.
Special Handling:
  • Allow specimen to clot completely at room temperature
  • Separate from cells ASAP
Rejection Criteria:
  • Grossly Lipemic Samples
  • Heat inactivated
  • Hemolyzed specimens
  • Icteric specimen
  • Microbial Contamination
Stability:Ambient: 8 Hour(s); Refrigerated: 2 Day(s); Frozen: 1 Month(s); Incubated: Unacceptable
  • Enzyme-Linked ImmunoSorbent Assay (ELISA)
Performed:Tuesday, Friday
Reported:3-5 Day(s)
Positive Results will be repeated and reported next day.
CPT Codes:
  • 86788
Interpretive Data:General Reference Range : none detected

WNV IgM may produce false positive results due to other flaviviruses or residual IgM from previous infection present for over 500 days. IgM positive results for children may also be caused by cross-reactivity with enteroviruses.

Please note: updated reference range as of 08/07/2017.
  • 2807 - WEST NILE AB, IgM
Print Friendly, PDF & Email

It is preferable to locate tests on the website and not rely on printed test information, which may soon be out of date.
Updated test information can only be guaranteed by using this website.