Test Overview
Test Methodology

Immunofluorescence Assay (IFA)

Reference Range *

CALIFORNIA VIRUS (La CROSSE) ENCEPHALITIS ANTIBODY
IgG: <1:10
IgM: <1:10
Reference values apply to all ages.

EASTERN EQUINE ENCEPHALITIS ANTIBODY
IgG: <1:10
IgM: <1:10
Reference values apply to all ages.

ST. LOUIS ENCEPHALITIS ANTIBODY
IgG: <1:10
IgM: <1:10
Reference values apply to all ages.

WESTERN EQUINE ENCEPHALITIS
IgG: <1:10
IgM: <1:10
Reference values apply to all ages.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Limitations

* Serum testing is not advisable to order as IgM and IgG seropositivity can persist for months or years after acute infection

Test Details
Days Set Up
Monday - Friday
Analytic Time

2 - 5 days

Soft Order Code
ARBOP
Synonyms
    Laboratory
    Sendout
    Reference Laboratory
    Mayo ARBOP
    Section
    Special Testing
    Specimen Requirements
    Collection Instructions

    Collect specimen in an SST or red top tube. Spin and Aliquot into a screw capped plastic tube. Send to Specimen Processing refrigerated.

    Normal Volume
    0.5 mL serum
    Minimum Volume
    0.2 mL serum
    Storage Temperature
    Refrigerated preferred, frozen acceptable
    Additional Information

    Test performed by Mayo Clinic Laboratories

    Billing
    CPT Code
    86651x2, 86652x2, 86653x2, 86654x2
    NY State Approved
    No