ARUP's Laboratory Test Directory
| 0098734: Western Equine Encephalitis Antibody, IgM by IFA, Serum |
| Test Mnemonic: WEST M SER | |
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Methodology: Indirect Fluorescent Antibody
Performed: Tue, Fri Reported: 1-5 days |
| Specimen Required: | |
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Collect: One 4 mL SST.
Transport: 1 mL serum at 2-8°C. (Min: 0.5 mL) Submit specimen in an ARUP Standard Transport Tube. Pediatric Collection/Transport: 0.15 mL serum at 2-8°C. Remarks: Separate serum from cells ASAP. Acute and convalescent specimens must be labeled as such; parallel testing is preferred and convalescent specimens must be received within 30 days from receipt of the acute specimens. Please mark specimen plainly as "acute" or "convalescent." Unacceptable Conditions: Plasma. Heat-inactivated, severely lipemic, contaminated, or hemolyzed specimens. Stability: After separation from cells: Ambient: 2 days; Refrigerated: 2 weeks; Frozen: 1 year |
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| Reference Interval: |
| Less than 1:16 |
| Interpretive Data: | |
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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.
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| CPT Code(s): | |
| 86654 |