St. Louis Encephalitis Virus IgM Ab, IFA (Serum)

Test Code

24352

CPT Codes
86653

Preferred Specimen

1 mL serum

Minimum Volume

0.1 mL

Transport Container

Plastic screw-cap vial

Transport Temperature

Refrigerated (cold packs)

Specimen Stability

Room temperature: 7 days
Refrigerated: 14 days
Frozen: 30 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Gross hemolysis • Gross lipemia • Gross icterus

Methodology
Indirect Immunofluorescence Assay

Setup Schedule

Set up: Mon-Fri; Report available: 3 days

Reference Range

<1:16

Clinical Significance

IgG titers ≥ 1:16 are suggestive of exposure while the presence of IgM indicates recent infection. Human infections are seasonal, from mid- to late-summer, occurring throughout the southern, southwestern, and west central states. Strong cross-reactivity may be seen with other Group B Arboviruses (Flavivirus) including Dengue, Japanese Encephalitis, Rio Bravo, Powassan, and Yellow Fever.

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.