California Encephalitis Antibody, IgM by IFA, Serum (INACTIVE as of 10/30/14: See Ordering Recommendations)
0098731
Ordering Recommendation
No alternative testing available in the U.S. See Inactivation Notification.
Mnemonic
CAL 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
Remove from 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. Heparinized specimens. Contaminated, heat-inactivated, or severely lipemic specimens.  
Remarks
  
Stability
After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles)  
Reference Interval
Less than 1:16  
Interpretive Data
This test is intended to be used as a semi-quantitative means of detecting California Encephalitis Group virus-specific IgM in serum samples in which there is a clinical suspicion of California Encephalitis Group virus infection. A positive result for IgM may suggest current or recent infection. This test should not be used solely for quantitative purposes, nor should the results be used without correlation to clinical history or other data. LaCross virus is related within the California Encephalitis Group and generally is reactive with antibody to other viruses within this group.  
Note
 
CPT Code(s)
86651
Components
Component Test Code*Component Chart NameLOINC
0098731California Encephalitis IgM10905-8
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • California Encephalitis Antibody, IgM Serum
  • Encephalitis Antibody
  • Encephalitis, La Crosse
  • La Crosse Encephalitis