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Test Name:
Saint Louis Encephalitis IgM Antibody, by IFA, Serum
- SBMF No:
45479 - Performance Lab Name:
ARUP Laboratories - Test Mnemonic:
ST LOUIS M - ABN:
Not required - CPT Code:
86653 - LOINC Code:
10907-4 - Ref Lab Test No:
0098732 - Also Known As:
Encephalitis Antibody, St Louis, IgM
SLE IgM Ab
St Louis IgM Ab
St. Louis IgM Ab - Also See:
45473 California Encephalitis IgM Antibody, Serum
45476 Eastern Equine Encephalitis IgM Antibody, Serum
28239 West Nile Virus IgM Antibody, Serum
45482 Western Equine Encephalitis IgM Antibody, Serum - Spec Type:
Serum - Spec Container:
Gold top (SST) or red top (serum) tube - Pref Vol:
1.0 mL - Min Vol:
0.5 mL
Pediatric Collection: 0.15 mL - Fasting:
No - Spec Collect:
Routine venipuncture
Parallel testing is preferred
Label samples as: "acute" or "convalescent"
Convalescent samples must be received within 30 days from receipt of acute samples - Spec Process:
Clot 30 minutes
Promptly centrifuge 15 minutes
Immediately transfer serum to separate plastic tube - Spec Store Transport:
Refrigerated - Spec Stability:
After separation from cells:
48 hours room temperature (20-30°C)
2 weeks refrigerated (2-8°C)
1 year frozen (-20°C) – Do not use frost-free units that undergo repeated freeze/thaw cycles - Spec Reject:
Plasma, heat-inactivated, severely lipemic, contaminated, or hemolyzed sample - Methodology:
Indirect Fluorescent Antibody (IFA) - Clinical Significance:
Refer to:
- Reference Range:
- St. Louis Encephalitis Antibody, IgM by IFA, Serum
- Less than 1:16
- Interpretive Data:
- This test is intended to be used as a semi-quantitative means of detecting St. Louis virus-specific IgM in serum samples in which there is a clinical suspicion of St. Louis 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. Because other members of the Flaviviridae family, such as West Nile virus, show extensive cross-reactivity with St. Louis virus, serologic testing specific for these species should also be performed.
- Day Run:
Tue, Fri - Time Reported:
2-6 days - Test Type:
INFECTIOUS ANTIBODY
