ARUP's Laboratory Test Directory
| 0050509: Eastern Equine Encephalitis Antibody, IgG by IFA, Serum |
| Test Mnemonic: EASTERN | |
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#ExistMethodology>
Methodology: Indirect Fluorescent Antibody
*ExistMethodology> #ExistPerformed> Performed: Tue, Fri *ExistPerformed> #ExistReported> Reported: 1-5 days *ExistReported> |
| Specimen Required: | |
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#ExistCollect>
Collect: One 4 mL SST.
*ExistCollect> #ExistTransport> Transport: 1 mL serum at 2-8°C. (Min: 0.5 mL) Submit specimen in an ARUP Standard Transport Tube. *ExistTransport> #ExistPedCollectTransport> Pediatric Collection/Transport: 0.15 mL serum at 2-8°C. *ExistPedCollectTransport> #ExistRemarks> 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." *ExistRemarks> #ExistConditions> Unacceptable Conditions: Severely contaminated, severely lipemic, or hemolyzed specimens. *ExistConditions> #ExistStability> Stability: After separation from cells: Ambient: 2 days; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles) *ExistStability> |
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| Reference Interval: |
| #ExistRefRange> Less than 1:16 *ExistRefRange> |
| Interpretive Data: | |
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#ExistInterpData>
A positive result for IgG may suggest current or past infection. Eastern equine encephalitis and western equine encephalitis viruses are both related and will show cross-reactivity. Initial infection by one of these viruses will show a specific rise in titer which is higher than titers against any other viruses of the group. A subsequent infection by another virus within this group, however, will boost the titer against the initial infecting virus (anamnestic response) and make a specific diagnosis difficult.
*ExistInterpData> |
| CPT Code(s): | |
| 86652 |