Western Equine Encephalitis Antibody, IgM by IFA, Serum
0098734
Ordering Recommendation
 
Mnemonic
WEST M SER
Methodology
Semi-Quantitative Indirect Fluorescent Antibody
Performed
Tue, Fri
Reported
1-5 days  
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
Specimen Required
Patient Preparation
  
Collect
Serum separator tube.  
Specimen Preparation
Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.15 mL) Parallel testing is preferred and convalescent specimens must be received within 30 days from receipt of the acute specimens. Mark specimens plainly as "acute" or "convalescent."  
Storage/Transport Temperature
Refrigerated.  
Unacceptable Conditions
Plasma. Contaminated, heat-inactivated, hemolyzed, or severely lipemic specimens.  
Remarks
  
Stability
After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year  
Reference Interval
Less than 1:16  
Interpretive Data
This test is intended to be used as a semi-quantitative means of detecting western equine encephalitis virus-specific IgM in serum samples in which there is a clinical suspicion of western equine encephalitis virus infection. A positive result for IgM may suggest current or recent infection. This test should not be used solely for quantitative purpose, nor should the results be used without correlation to clinical history or other data. Because other members of the Alphavirus family, such as eastern equine encephalitis virus, show extensive cross-reactivity with western equine encephalitis virus, serologic testing for these species should also be performed.  
Note
 
CPT Code(s)
86654
Components
Component Test Code*Component Chart Name
0098734Western Equine Enceph Ab, IgM, Ser
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Aliases
  • Arbovirus IgM Serology
  • Encephalitis Antibody, Western Equine IgM
  • Encephalitis IgM Antibodies
  • WEE IgM
  • Western Equine Encephalitis IgM