Arbovirus Antibodies, IgM, Serum
Ordering Recommendation
Not recommended as a stand-alone test. Refer to Arbovirus Antibodies, IgG and IgM, Serum (2001594).
New York DOH Approval Status
Specimen Required
Serum separator tube. Also acceptable: Plain red.
Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.4 mL) Parallel testing is preferred and convalescent specimens must be received within 30 days from receipt of acute specimens. Mark specimens plainly as "acute" or "convalescent."
Refrigerated.
Plasma. Contaminated, heat-inactivated, hemolyzed, or severely lipemic specimens.
After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles)
Methodology
Semi-Quantitative Indirect Fluorescent Antibody/Semi-Quantitative Enzyme-Linked Immunosorbent Assay
Performed
Tue, Fri
Reported
1-5 days
Reference Interval
Test Number |
Components |
Reference Interval |
---|---|---|
West Nile Virus Ab, IgM, Ser | 0.89 IV or less | |
California Encephalitis IgM | Less than 1:16 | |
St. Louis Encephalitis Ab, IgM, Serum | Less than 1:16 | |
Eastern Equine Enceph Ab, IgM | Less than 1:16 | |
Western Equine Enceph Ab, IgM, Ser | Less than 1:16 |
Interpretive Data
Component | Interpretation |
---|---|
West Nile Virus Antibody, IgM by ELISA, Serum | 0.89 IV or less: Negative - No significant level of West Nile virus IgM antibody detected. 0.90-1.10 IV: Equivocal - Questionable presence of West Nile virus IgM antibody detected. Repeat testing in 10-14 days may be helpful. 1.11 IV or greater: Positive - Presence of IgM antibody to West Nile virus detected, suggestive of current or recent infection. |
FDA
Note
Hotline History
CPT Codes
86651; 86652; 86653; 86654; 86788
Components
Component Test Code* | Component Chart Name | LOINC |
---|---|---|
0050236 | West Nile Virus Ab, IgM, Ser | 38166-5 |
0098731 | California Encephalitis IgM | 10905-8 |
0098732 | St. Louis Encephalitis Ab, IgM, Serum | 10907-4 |
0098733 | Eastern Equine Enceph Ab, IgM | 10898-5 |
0098734 | Western Equine Enceph Ab, IgM, Ser | 6958-3 |