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Test Code WNMC West Nile Virus Antibody, IgM, Spinal Fluid

Reporting Name

West Nile Virus Ab, IgM, CSF

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Useful For

Aids in diagnosing central nervous system West Nile virus infections during the acute phase

Method Name

Only orderable as part of a profile. For more information see WNC / West Nile Virus Antibody, IgG and IgM, Spinal Fluid.

 

Enzyme-Linked Immunosorbent Assay (ELISA)


Specimen Required


Only orderable as part of a profile. For more information see WNC / West Nile Virus Antibody, IgG and IgM, Spinal Fluid.

 

Supplies: Sarstedt Aliquot Tube. 5mL (T914)

Collection Container/Tube: Sterile vial

Submission Container/Tube: Plastic, 5-mL aliquot tube (T914)

Specimen Volume: 1 mL


Specimen Type

CSF

Specimen Minimum Volume

0.8 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
CSF Refrigerated (preferred) 7 days
  Frozen  30 days

Reject Due To

Gross hemolysis Reject

Reference Values

Only orderable as part of a profile. For more information see WNC / West Nile Virus Antibody, IgG and IgM, Spinal Fluid.

 

IgM: Negative

Reference values apply to all ages.

Interpretation

A positive result is consistent with the acute phase of West Nile virus (WNV) meningitis or encephalitis. In the very early stages of acute WNV infection, IgM may be detectable in cerebrospinal fluid before it becomes detectable in serum.

 

A negative result may indicate absence of disease. However, specimens collected too early in the acute phase may be negative for IgM-class antibodies to WNV. If WNV central nervous system infection is suspected, a second specimen should be collected in 1 to 2 weeks and tested.

Day(s) Performed

Monday, Wednesday, Friday

Report Available

Same day/1 day

Test Classification

This test has been modified from the manufacturer's instructions. Its performance characteristics were determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information

86788

LOINC Code Information

Test ID Test Order Name Order LOINC Value
WNMC West Nile Virus Ab, IgM, CSF 29569-1

 

Result ID Test Result Name Result LOINC Value
WNMC West Nile Virus Ab, IgM, CSF 29569-1