West Nile Virus (Human) IgM
Fee: Please refer to fee schedule
West Nile Virus IgM testing is intended for the qualitative detection of West Nile Virus (WNV) IgM in human blood and cerebral spinal fluid (CSF) specimens by micro-sphere immunoassay, from patients with clinically apparent illness having symptoms that range from a simple febrile headache to neuroinvasive disease. Prior to submitting specimen, testing must be approved by UDOH Epidemiology at (801)538-6191.
Monday – Friday depending on season.
Microsphere Immunoassay (MIA)
- Collect:Serum or CSF, minimum specimen volume of 100µl
- Specimen Preparation:Sterile container
- Storage/Transport Conditions:refrigerate (freeze if transport delayed)
- Unacceptable Conditions:Specimen volume less than 100µL.
- Remarks: Testing must be approved by UDOH Epidemiology at (801) 538-6191.
- Stability: Ambient: 8 hours; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles)
Positive, not detected, or non-specific
No IgM antibodies against West Nile Virus detected by Micro-sphere Immunoassay.
Presumptively positive for IgM antibodies to West Nile Virus by Micro-sphere Immunoassay. (serum)
Confirmed positive for IgM antibodies against West Nile Virus by Micro-sphere Immunoassay. (CSF)
Non-specific for IgM antibodies against West Nile Virus by Micro-sphere Immunoassay.
If initial serum specimen was collected within 9 days of onset of symptoms, a convalescent serum will be requested for IgM negative and nonspecific tests.